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      Red, blue, and black Glazelock interlocking U-shaped shims arranged beneath the brand logo, with a Made in USA badge on a white background.
      Black Glazelock interlocking plastic U-shaped shim with two raised tabs and a circular molding mark, shown on a white background.
      Glazelock® Interlocking U-Shaped Shims, 3 x 1-1/2 In, 1/2-In Slot | Multiple Pack Sizes | Made in USA
      A partner brand, sold by FLI Products
      Glazelock
      from $6.47
      $0.09/item
      Three u-shaped glazelock shims in red blue and black with 2 by 1.5 inch size and 0.5 inch slot
      Glazelock product-family chart showing U-shaped, interlocking, snap-off, flat-plate, tapered, Wedge-Lock, and pre-scored wood shims.
      Glazelock® Compact Horseshoe Shims, 2 x 1-1/2 In, 1/2-In Slot | Multiple Pack Sizes | Made in USA
      A partner brand, sold by FLI Products
      Glazelock
      from $5.40
      $0.07/item
      Glazelock snap-off shim comparison graphic showing black GL17 short and GL16 long stacks, green MS01 mini, and black MS02 mini, with layer and stack labels.
      Glazelock product-family chart showing U-shaped, interlocking, snap-off, flat-plate, tapered, Wedge-Lock, and pre-scored wood shims.
      Glazelock® Snap-Off Stackable Horseshoe Shims, 1-7/8 In Wide, Multiple Lengths | Multiple Pack Sizes | Made in USA
      A partner brand, sold by FLI Products
      Glazelock
      from $45.99
      Single black Glazelock Wedge-Lock plastic shim with recessed grid cells, ridged surface, and tapered tip on a white background.
      Glazelock Wedge-Lock demonstration showing black shims separately, crossed, and overlapped in opposite directions to form an adjustable leveling pair.
      Glazelock® Wedgelock Plastic Wedge Shims, 8 x 1-1/2 x 5/16 In | 288-Pack | Made in USA
      A partner brand, sold by FLI Products
      Glazelock
      $73.10
      Three glazelock shims in red blue and black heavy-duty interlocking u shims with 7/8 inch slot 4 by 3 inches
      Dark gray Glazelock heavy-duty plastic U-shaped shim with circular molding marks and two raised interlocking tabs on a white background.
      Glazelock® Heavy-Duty Interlocking U Shims, 4 x 3 In, 7/8-In Slot | Multiple Pack Sizes | Made in USA
      A partner brand, sold by FLI Products
      Glazelock
      from $12.83
      A bundle of natural pine pre-scored wood shims by glazelock inc with one loose shim visible
      Glazelock product-family chart showing U-shaped, interlocking, snap-off, flat-plate, tapered, Wedge-Lock, and pre-scored wood shims.
      Glazelock® Natural Pine Wood Shims, Original or Pre-Scored, 8 x 1-1/4 x 3/8 In | Multiple Pack Sizes | Made in USA
      A partner brand, sold by FLI Products
      Glazelock
      from $13.80
      Assorted colorful plastic glazelock shims including square horseshoe shims 4x3 inches with 7/8 inch slot
      Glazelock product-family chart showing U-shaped, interlocking, snap-off, flat-plate, tapered, Wedge-Lock, and pre-scored wood shims.
      Glazelock® Square Horseshoe Shims, 4 x 3 In, 7/8-In Slot | Multiple Pack Sizes | Made in USA
      A partner brand, sold by FLI Products
      Glazelock
      from $87.30
      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® Extended Horseshoe Shims, 3-1/2 x 1-1/2 In, 1/2-In Slot | Multiple Pack Sizes | Made in USA
      A partner brand, sold by FLI Products
      Glazelock
      from $6.00
      Glazelock shims u-shaped horseshoe plastic shims in red blue and black with 3 inch by 2 5/16 inch size and 3/4 inch slot
      Glazelock product-family chart showing U-shaped, interlocking, snap-off, flat-plate, tapered, Wedge-Lock, and pre-scored wood shims.
      Glazelock® U-Shaped Horseshoe Shims, 3 x 2-5/16 In, 3/4-In Slot | Multiple Pack Sizes | Made in USA
      A partner brand, sold by FLI Products
      Glazelock
      from $11.08
      $0.13/item
      Green u-shaped plastic glazelock shim with two rows of four square segments for stacking and spacing
      Black Glazelock snap-off stackable horseshoe shim with layered construction, segmented arms, and a projecting tab on a white background.
      Glazelock® Green Snap-Off Stackable Horseshoe Shims, 4-3/16 x 1-7/8 In | Multiple Pack Sizes | Made in USA
      A partner brand, sold by FLI Products
      Glazelock
      from $61.81
      Glazelock flat-plate dimension chart showing 4-by-2-inch shims: gray FS01 at 1/4-inch thick, red FS02 at 1/8 inch, and blue FS03 at 1/16 inch.
      Various glazelock shims including plastic flat plate, u-shaped, wedge-lock, and pre-scored wood shims in multiple colors
      Glazelock® Window & Door Flat Plate Shims, Multiple Thicknesses | Multiple Pack Sizes | Made in USA
      A partner brand, sold by FLI Products
      Glazelock
      from $45.13
      A stack of black textured plastic glazelock shims with one tapered wedge separated below the stack
      Glazelock GL-H8 tapered plastic shim dimension diagram showing a labeled pack and a single textured shim measuring 7.75 by 1.5 inches.
      Glazelock® GL-H8 Plastic Tapered Wedge Shims, 7-3/4 x 1-1/2 In | 288-Pack | Made in USA
      A partner brand, sold by FLI Products
      Glazelock
      from $47.83
      Glazelock Shims: The Professional's Guide to Perfect Leveling🔧 Why Leveling Separates Professional Results from Amateur Ones A door that swings perfectly, a tile floor with no lippage, a window that seals completely, an appliance that doesn't rock — these outcomes depend on precise shimming at installation. Glazelock interlocking precision shims are the...
      Glazelock Shims: The Installer-Driven Innovation Changing Window and Door Installation Glazelock Shims: The Installer-Driven Innovation Changing Window and Door Installation If you've ever installed a window or door, you already know: shimming is everything. It determines alignment, structural stability, and long-term performance. But traditional shimming methods are time-consuming, inconsistent, and prone to costly mistakes. In construction, small mistakes don't stay small. That's exactly the problem...