Glazelock square horseshoe shims assorted plastic 4 x 3
Glazelock shims: assorted plastic square horseshoe 4x3, U-shaped, wood colors
Glazelock shims: blue, red, black interlocking stackable horseshoe shims
Glazelock square horseshoe shims black plastic wedge-lock ribbed surface
Glazelock shims black rubber U-shaped clip textured surface
Red Glazelock square horseshoe shims U-shaped plastic tool
Glazelock square horseshoe shims blue U-shaped plastic tool
Glazelock square horseshoe shims brown U-shaped plastic with USA flag
Glazelock square horseshoe shims brown U-shaped 4x3x0.5 inch
Glazelock shims beige U-shaped plastic seat cushion with flag sticker
Glazelock square horseshoe shims assorted plastic 4 x 3
Glazelock shims: assorted plastic square horseshoe 4x3, U-shaped, wood colors
Glazelock shims: blue, red, black interlocking stackable horseshoe shims
Glazelock square horseshoe shims black plastic wedge-lock ribbed surface
Glazelock shims black rubber U-shaped clip textured surface
Red Glazelock square horseshoe shims U-shaped plastic tool
Glazelock square horseshoe shims blue U-shaped plastic tool
Glazelock square horseshoe shims brown U-shaped plastic with USA flag
Glazelock square horseshoe shims brown U-shaped 4x3x0.5 inch
Glazelock shims beige U-shaped plastic seat cushion with flag sticker
Glazelock - Leveling Shims

Glazelock® Square Horseshoe Shims — 4" x 3" | 7/8" Slot

$108.90
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  • Father's Day — Order by June 10 for delivery by June 15. Free Shipping, Continental US over $49.99
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  • Backordered, shipping soon
Made in USA

Glazelock® Square Horseshoe Shims — 4" x 3", 7/8" Slot | Made in USA

Glazelock® Square Horseshoe Shims deliver maximum stability with robust 4" x 3" dimensions and a large 7/8" slot. The square profile provides superior load-bearing capacity for demanding construction applications — invented by a window installer and made in USA since 1997.

Key Specifications

  • Dimensions: 4" x 3"
  • Slot: 7/8"
  • Shape: Square horseshoe (U-shaped)
  • Material: Heavy-duty plastic
  • Colors: Assorted
  • Origin: Made in USA since 1997

Key Benefits

  • Heavy-Duty 4" x 3" — Maximum load-bearing surface for demanding applications
  • Large 7/8" Slot — Accommodates larger pipes, anchor bolts, and hardware
  • Square Profile — Enhanced stability compared to narrower horseshoe designs
  • Assorted Colors — Easy thickness identification on the job site
  • Made in USA — Consistent quality since 1997

Perfect For

  • Heavy window and commercial door installation
  • Large cabinet and countertop support
  • Industrial machinery leveling
  • Structural and load-bearing construction applications
  • Applications requiring a large slot for bigger hardware

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

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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.
What slot width does this shim have? +
This 4" x 3" square horseshoe shim features a 7/8" slot, accommodating larger pipes, bolts, and hardware than standard 1/2" slot shims.
Are these shims color-coded? +
Yes. Glazelock shims are color-coded by thickness for easy identification during installation.

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