Assorted colors and thicknesses of glazelock shims U-shaped extended horseshoe 3-1/2 by 1-1/2 inch with 1/2 inch slot

Glazelock product-family chart showing U-shaped, interlocking, snap-off, flat-plate, tapered, Wedge-Lock, and pre-scored wood shims.

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

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

Brown Glazelock U-shaped shim GLZ09 dimension diagram labeled 3 inches long, 1.5 inches wide, and 1/2 inch thick, with Made in USA badge.

Black Glazelock U-shaped shim GLZ10/Econo10 dimension diagram labeled 3 inches long, 1.5 inches wide, and 1/4 inch thick.

Blue Glazelock U-shaped shim GLZ12/Econo12/SP12 dimension diagram labeled 3 inches long, 1.5 inches wide, and 1/16 inch thick.

Red Glazelock U-shaped shim GLZ11/Econo11/SP11 dimension diagram labeled 3 inches long, 1.5 inches wide, and 1/8 inch thick.

Brown glossy u-shaped glazelock shims with american flag sticker made in usa for horseshoe applications

Black matte u-shaped glazelock shims with american flag emblem for extended horseshoe shim use

Red u-shaped plastic glazelock shims with made in usa label for extended horseshoe shim use 3-1/2 x 1-1/2 inches

Blue extended Glazelock U-shaped shim with a circular molding mark and Made in USA flag label on a white background.

Glazelock - Leveling Shims

Glazelock® Extended Horseshoe Shims, 3-1/2 x 1-1/2 In, 1/2-In Slot | Multiple Pack Sizes | Made in USA

Name: Glazelock® Extended Horseshoe Shims, 3-1/2 x 1-1/2 In, 1/2-In Slot | Multiple Pack Sizes | Made in USA
Brand: Glazelock
SKU: GLZ09
Price: 71.23 USD
Availability: InStock

A partner brand, sold by FLI Products

Made in USA

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Regular price$71.23

Shipping calculated at checkout.

Size —

Size

1/2"

1/4"

1/8"

45307

Count

250pc

1000pc

500pc

100pc

360pc (12x30)

720pc (12x60)

1440 (12x120)

In stock, ready to ship
Backordered, shipping soon

Extended profile: A 3-1/2-inch length provides a longer footprint for compatible spacing and leveling tasks.
Horseshoe shape: The open U-shaped design positions around compatible hardware.
1/2-inch slot: Check your bolt, pipe or anchor dimensions against the slot before use.
Made in the USA: High-impact plastic shims in assorted colors.

Dimensions and design

Each shim measures 3-1/2 × 1-1/2 inches with a 1/2-inch slot. This listing is for the extended U-shaped horseshoe profile.

Installation uses

Use for compatible window, commercial door, cabinet and countertop installations where the longer profile suits the project. Keep the required spacing and hardware clearance in mind as you position each shim.

Choose for your application

Check thickness, dimensions and installation requirements before ordering. Match the shim to your project rather than assuming a load capacity from its size alone.

Material and colors

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

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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.

Are these shims color-coded? +

Yes. Glazelock shims are color-coded by thickness for easy identification during installation, saving time on the job site.

What pack sizes are available? +

Available in assorted packs for professional and DIY leveling applications.