Glazelock Interlocking Horseshoe Shims, 3 x 1-1/2 In

Name: Glazelock® Interlocking U-Shaped Shims, 3 x 1-1/2 In, 1/2-In Slot | Multiple Pack Sizes | Made in USA
Brand: Glazelock
SKU: GLZ01
Price: 88.2 USD
Availability: InStock

Black Glazelock interlocking plastic U-shaped shim with two raised tabs and a circular molding mark, shown on a white background.

The image shows colorful glazelock shims including u-shaped, interlocking, snap-off, flat plate, wedge-lock, tapered, and pre-scored types

Underside of a black Glazelock interlocking U-shaped shim, showing two rectangular slots and molded channels along the arms.

Glazelock application collage showing shims used for tile spacing, window and door installation, cabinetry, and countertop leveling.

Glazelock graphic showing stacked blue, red, and black interlocking shims above a shim assortment and commercial building photo.

Red Glazelock interlocking U-shaped shim with two raised tabs, a circular molding mark, and a Made in USA flag label on a white background.

Blue Glazelock GLZ03/Econo03 interlocking shim dimension diagram labeled 3 inches long, 1.5 inches wide, and 1/16 inch thick.

Blue Glazelock interlocking U-shaped shim with two raised tabs and a circular molding mark on a white background.

Red Glazelock GLZ02/Econo02 interlocking shim dimension diagram labeled 3 inches long, 1.5 inches wide, and 1/8 inch thick.

$88.20

$0.09/item

Shipping calculated at checkout.

In stock, ready to ship
Backordered, shipping soon

Interlocking stacks: Shims connect when stacked to help reduce shifting as you work.
Adjustable spacing: Stack compatible shims to build the spacing your installation requires.
1/2-inch slot: The U-shaped opening fits around compatible pipes, bolts and hardware.
Made in the USA: High-impact plastic construction in assorted colors.

Dimensions and design

Each shim measures 3 × 1-1/2 inches with a 1/2-inch slot. The U-shaped, or horseshoe, profile features an interlocking stacking design.

Installation uses

Use for compatible window and glazing installations, interior or exterior doors, cabinet alignment and leveling. The open slot lets you position the shim around compatible hardware while the interlocking design helps hold stacked pieces together.

Choose for your application

Check the required thickness, hardware clearance and installation requirements before ordering.

Material and colors

High-impact plastic in assorted colors. Made in the USA.

[{"id":41696230211767,"title":"1\/4\" \/ 1000pc","option1":"1\/4\"","option2":"1000pc","option3":null,"sku":"GLZ01","requires_shipping":true,"taxable":true,"featured_image":{"id":46166757048503,"product_id":7284004126903,"position":12,"created_at":"2026-07-03T12:05:02-04:00","updated_at":"2026-07-03T12:05:02-04:00","alt":"Black Glazelock interlocking plastic U-shaped shim with two raised tabs and a circular molding mark, shown on a white background.","width":1000,"height":1000,"src":"\/\/www.fliproducts.com\/cdn\/shop\/files\/glazelock-r-interlocking-u-shaped-shims-3-x-1-1-2-slot-1-4-393.webp?v=1783094702","variant_ids":[41696230211767]},"available":true,"name":"Glazelock® Interlocking U-Shaped Shims, 3 x 1-1\/2 In, 1\/2-In Slot | Multiple Pack Sizes | Made in USA - 1\/4\" \/ 1000pc","public_title":"1\/4\" \/ 1000pc","options":["1\/4\"","1000pc"],"price":8820,"weight":9525,"compare_at_price":null,"inventory_management":"shopify","barcode":"850040993004","featured_media":{"alt":"Black Glazelock interlocking plastic U-shaped shim with two raised tabs and a circular molding mark, shown on a white background.","id":36535871570103,"position":12,"preview_image":{"aspect_ratio":1.0,"height":1000,"width":1000,"src":"\/\/www.fliproducts.com\/cdn\/shop\/files\/glazelock-r-interlocking-u-shaped-shims-3-x-1-1-2-slot-1-4-393.webp?v=1783094702"}},"requires_selling_plan":false,"unit_price":9,"unit_price_measurement":{"measured_type":"count","quantity_value":"1000.0","quantity_unit":"item","reference_value":1,"reference_unit":"item"},"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}},{"id":41696230244535,"title":"1\/4\" \/ 100pc","option1":"1\/4\"","option2":"100pc","option3":null,"sku":"Econo01","requires_shipping":true,"taxable":true,"featured_image":{"id":46166759276727,"product_id":7284004126903,"position":14,"created_at":"2026-07-03T12:05:11-04:00","updated_at":"2026-07-03T12:05:11-04:00","alt":"Black Glazelock interlocking plastic U-shaped shim with two raised tabs and a circular molding mark, shown on a white background.","width":1000,"height":1000,"src":"\/\/www.fliproducts.com\/cdn\/shop\/files\/glazelock-r-interlocking-u-shaped-shims-3-x-1-1-2-slot-1-4-914.webp?v=1783094711","variant_ids":[41696230244535]},"available":true,"name":"Glazelock® Interlocking U-Shaped Shims, 3 x 1-1\/2 In, 1\/2-In Slot | Multiple Pack Sizes | Made in USA - 1\/4\" \/ 100pc","public_title":"1\/4\" \/ 100pc","options":["1\/4\"","100pc"],"price":1320,"weight":1361,"compare_at_price":null,"inventory_management":"shopify","barcode":"850040993318","featured_media":{"alt":"Black Glazelock interlocking plastic U-shaped shim with two raised tabs and a circular molding mark, shown on a white background.","id":36535874093239,"position":14,"preview_image":{"aspect_ratio":1.0,"height":1000,"width":1000,"src":"\/\/www.fliproducts.com\/cdn\/shop\/files\/glazelock-r-interlocking-u-shaped-shims-3-x-1-1-2-slot-1-4-914.webp?v=1783094711"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}},{"id":41696230277303,"title":"1\/8\" \/ 1000pc","option1":"1\/8\"","option2":"1000pc","option3":null,"sku":"GLZ02","requires_shipping":true,"taxable":true,"featured_image":{"id":46166760685751,"product_id":7284004126903,"position":15,"created_at":"2026-07-03T12:05:15-04:00","updated_at":"2026-07-03T12:05:15-04:00","alt":"Red Glazelock interlocking U-shaped shim with two raised tabs, a circular molding mark, and a Made in USA flag label on a white background.","width":1000,"height":1000,"src":"\/\/www.fliproducts.com\/cdn\/shop\/files\/glazelock-r-interlocking-u-shaped-shims-3-x-1-1-2-slot-1-8-136.webp?v=1783094715","variant_ids":[41696230277303]},"available":true,"name":"Glazelock® Interlocking U-Shaped Shims, 3 x 1-1\/2 In, 1\/2-In Slot | Multiple Pack Sizes | Made in USA - 1\/8\" \/ 1000pc","public_title":"1\/8\" \/ 1000pc","options":["1\/8\"","1000pc"],"price":6363,"weight":5897,"compare_at_price":null,"inventory_management":"shopify","barcode":"850040993011","featured_media":{"alt":"Red Glazelock interlocking U-shaped shim with two raised tabs, a circular molding mark, and a Made in USA flag label on a white background.","id":36535875207351,"position":15,"preview_image":{"aspect_ratio":1.0,"height":1000,"width":1000,"src":"\/\/www.fliproducts.com\/cdn\/shop\/files\/glazelock-r-interlocking-u-shaped-shims-3-x-1-1-2-slot-1-8-136.webp?v=1783094715"}},"requires_selling_plan":false,"unit_price":6,"unit_price_measurement":{"measured_type":"count","quantity_value":"1000.0","quantity_unit":"item","reference_value":1,"reference_unit":"item"},"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}},{"id":41696230310071,"title":"1\/8\" \/ 100pc","option1":"1\/8\"","option2":"100pc","option3":null,"sku":"Econo02","requires_shipping":true,"taxable":true,"featured_image":{"id":46166761930935,"product_id":7284004126903,"position":16,"created_at":"2026-07-03T12:05:20-04:00","updated_at":"2026-07-03T12:05:20-04:00","alt":"Red Glazelock interlocking U-shaped shim with two raised tabs, a circular molding mark, and a Made in USA flag label on a white background.","width":1000,"height":1000,"src":"\/\/www.fliproducts.com\/cdn\/shop\/files\/glazelock-r-interlocking-u-shaped-shims-3-x-1-1-2-slot-1-8-131.webp?v=1783094720","variant_ids":[41696230310071]},"available":true,"name":"Glazelock® Interlocking U-Shaped Shims, 3 x 1-1\/2 In, 1\/2-In Slot | Multiple Pack Sizes | Made in USA - 1\/8\" \/ 100pc","public_title":"1\/8\" \/ 100pc","options":["1\/8\"","100pc"],"price":1010,"weight":907,"compare_at_price":null,"inventory_management":"shopify","barcode":"850040993325","featured_media":{"alt":"Red Glazelock interlocking U-shaped shim with two raised tabs, a circular molding mark, and a Made in USA flag label on a white background.","id":36535876681911,"position":16,"preview_image":{"aspect_ratio":1.0,"height":1000,"width":1000,"src":"\/\/www.fliproducts.com\/cdn\/shop\/files\/glazelock-r-interlocking-u-shaped-shims-3-x-1-1-2-slot-1-8-131.webp?v=1783094720"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}},{"id":41696230342839,"title":"1\/16\" \/ 1000pc","option1":"1\/16\"","option2":"1000pc","option3":null,"sku":"GLZ03","requires_shipping":true,"taxable":true,"featured_image":{"id":46166754656439,"product_id":7284004126903,"position":10,"created_at":"2026-07-03T12:04:52-04:00","updated_at":"2026-07-03T12:04:52-04:00","alt":"Blue Glazelock interlocking U-shaped shim with two raised tabs and a circular molding mark on a white background.","width":1000,"height":1000,"src":"\/\/www.fliproducts.com\/cdn\/shop\/files\/glazelock-r-interlocking-u-shaped-shims-3-x-1-1-2-slot-1-16-318.webp?v=1783094692","variant_ids":[41696230342839]},"available":true,"name":"Glazelock® Interlocking U-Shaped Shims, 3 x 1-1\/2 In, 1\/2-In Slot | Multiple Pack Sizes | Made in USA - 1\/16\" \/ 1000pc","public_title":"1\/16\" \/ 1000pc","options":["1\/16\"","1000pc"],"price":3687,"weight":3175,"compare_at_price":null,"inventory_management":"shopify","barcode":"850040993028","featured_media":{"alt":"Blue Glazelock interlocking U-shaped shim with two raised tabs and a circular molding mark on a white background.","id":36535869407415,"position":10,"preview_image":{"aspect_ratio":1.0,"height":1000,"width":1000,"src":"\/\/www.fliproducts.com\/cdn\/shop\/files\/glazelock-r-interlocking-u-shaped-shims-3-x-1-1-2-slot-1-16-318.webp?v=1783094692"}},"requires_selling_plan":false,"unit_price":4,"unit_price_measurement":{"measured_type":"count","quantity_value":"1000.0","quantity_unit":"item","reference_value":1,"reference_unit":"item"},"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}},{"id":41696230375607,"title":"1\/16\" \/ 100pc","option1":"1\/16\"","option2":"100pc","option3":null,"sku":"Econo03","requires_shipping":true,"taxable":true,"featured_image":{"id":46166756163767,"product_id":7284004126903,"position":11,"created_at":"2026-07-03T12:04:57-04:00","updated_at":"2026-07-03T12:04:57-04:00","alt":"Blue Glazelock interlocking U-shaped shim with two raised tabs and a circular molding mark on a white background.","width":1000,"height":1000,"src":"\/\/www.fliproducts.com\/cdn\/shop\/files\/glazelock-r-interlocking-u-shaped-shims-3-x-1-1-2-slot-1-16-715.webp?v=1783094697","variant_ids":[41696230375607]},"available":true,"name":"Glazelock® Interlocking U-Shaped Shims, 3 x 1-1\/2 In, 1\/2-In Slot | Multiple Pack Sizes | Made in USA - 1\/16\" \/ 100pc","public_title":"1\/16\" \/ 100pc","options":["1\/16\"","100pc"],"price":647,"weight":454,"compare_at_price":null,"inventory_management":"shopify","barcode":"850040993332","featured_media":{"alt":"Blue Glazelock interlocking U-shaped shim with two raised tabs and a circular molding mark on a white background.","id":36535870685367,"position":11,"preview_image":{"aspect_ratio":1.0,"height":1000,"width":1000,"src":"\/\/www.fliproducts.com\/cdn\/shop\/files\/glazelock-r-interlocking-u-shaped-shims-3-x-1-1-2-slot-1-16-715.webp?v=1783094697"}},"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}}]

{"id":41696230211767,"title":"1\/4\" \/ 1000pc","option1":"1\/4\"","option2":"1000pc","option3":null,"sku":"GLZ01","requires_shipping":true,"taxable":true,"featured_image":{"id":46166757048503,"product_id":7284004126903,"position":12,"created_at":"2026-07-03T12:05:02-04:00","updated_at":"2026-07-03T12:05:02-04:00","alt":"Black Glazelock interlocking plastic U-shaped shim with two raised tabs and a circular molding mark, shown on a white background.","width":1000,"height":1000,"src":"\/\/www.fliproducts.com\/cdn\/shop\/files\/glazelock-r-interlocking-u-shaped-shims-3-x-1-1-2-slot-1-4-393.webp?v=1783094702","variant_ids":[41696230211767]},"available":true,"name":"Glazelock® Interlocking U-Shaped Shims, 3 x 1-1\/2 In, 1\/2-In Slot | Multiple Pack Sizes | Made in USA - 1\/4\" \/ 1000pc","public_title":"1\/4\" \/ 1000pc","options":["1\/4\"","1000pc"],"price":8820,"weight":9525,"compare_at_price":null,"inventory_management":"shopify","barcode":"850040993004","featured_media":{"alt":"Black Glazelock interlocking plastic U-shaped shim with two raised tabs and a circular molding mark, shown on a white background.","id":36535871570103,"position":12,"preview_image":{"aspect_ratio":1.0,"height":1000,"width":1000,"src":"\/\/www.fliproducts.com\/cdn\/shop\/files\/glazelock-r-interlocking-u-shaped-shims-3-x-1-1-2-slot-1-4-393.webp?v=1783094702"}},"requires_selling_plan":false,"unit_price":9,"unit_price_measurement":{"measured_type":"count","quantity_value":"1000.0","quantity_unit":"item","reference_value":1,"reference_unit":"item"},"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}}

Find this product online and in stores — see Where to Buy

14-Day Returns

Not happy? Request a return within 14 days of delivery.

Secure Checkout

Your payment information is encrypted and secure.

FAQs

What are Glazelock shims used for? +

Glazelock interlocking plastic shims are used for leveling and aligning windows, doors, frames, and other construction applications. Their interlocking design locks stacked shims together to prevent shifting during and after installation.

What makes Glazelock different from regular shims? +

Glazelock shims feature a patented interlocking design that locks stacked shims together so they won't shift or slide out of position — a common problem with standard plastic or wood shims.

Are Glazelock shims Made in USA? +

Yes. Glazelock shims have been Made in the USA since 1997.

What size is this Glazelock shim? +

This Glazelock shim measures 3" x 1-1/2" with a standard 1/2" slot, ideal for window and door installation with standard pipes and bolts.

What pack sizes are available? +

Available in packs of 100 and 1,000 pieces in thicknesses of 1/16", 1/8", and 1/4" for precise leveling control.

Glazelock® Interlocking U-Shaped Shims, 3 x 1-1/2 In, 1/2-In Slot | Multiple Pack Sizes | Made in USA