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      Home Improvement Hardware For Precision Installations And Professional Results

      Contractor-Grade Leveling Shims & HVAC Registers — Made In USA

      FLI Products' Home Improvement & Hardware collection offers contractor-grade tools and precision hardware engineered for window, door, tile, HVAC, and general home improvement installations. Whether you're a professional contractor, a serious DIYer, or a homeowner tackling a renovation, every product here is designed to deliver professional-quality results with less effort, less rework, and more confidence.

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      • GlazeLock™ — Professional Leveling Shims

        Precision interlocking shim systems for windows, doors, tile, cabinetry, and glazing applications. Non-compressible material holds position permanently — won't swell, shrink, or rot like wood. Installer-driven design. Made in USA.

      • Sierra Grates™ — HVAC Floor Registers & Grilles

        Heavy-duty steel floor registers and return grilles engineered for improved airflow, durability, and a clean, modern finish. Resists bending, rust, and everyday wear. Compatible with hardwood, tile, carpet, and vinyl floors. Available in multiple sizes.

      Learn More — Home Improvement Guides

      15 products
      Black rectangular steel floor register with adjustable slats from sierra grates contemporary vent cover series
      Bronze-finished sierra grates contemporary rectangular steel floor register with vertical slats and hinged vent cover
      Sierra Grates Contemporary Black Steel Floor Register
      Sierra Grates
      from $19.70
      Matte black steel floor register by sierra grates featuring a rectangular geometric grille vent cover design
      Bronze sierra grates floor register with geometric grille pattern metal vent cover for efficient air flow
      Sierra Grates Metro Matte Black Steel Floor Register
      Sierra Grates
      from $19.70
      Glazelock shims assorted plastic stackable horseshoe shims in various lengths and thicknesses for glazing or spacing
      The image shows glazelock plastic and wood shims including snap-off stackable horseshoe shims in red and blue colors
      Glazelock® Snap-Off Stackable Horseshoe Shims — 1-7/8" Wide
      Glazelock
      from $45.99
      Sold Out
      Three glazelock shims in red blue and black heavy-duty interlocking u shims with 7/8 inch slot 4 by 3 inches
      Dark gray matte glazelock shims made of plastic u shaped tool with circular cutouts for heavy-duty interlocking use
      Glazelock® Heavy-Duty Interlocking U Shims — 4" x 3" | 7/8" Slot
      Glazelock
      from $12.83
      Three white u-shaped plastic glazelock shims 3 x 1-1/2 inches with 1/2 inch slot for interlocking use
      Black u-shaped metal glazelock shims with two adjustable clamps and circular hole for interlocking use
      Glazelock® Interlocking U-Shaped Shims — 3" x 1-1/2" | 1/2" Slot
      Glazelock
      from $6.47
      Three rectangular glazelock shims in multiple colors and thicknesses made of plastic for window and door installation
      Various glazelock shims including plastic flat plate, u-shaped, wedge-lock, and pre-scored wood shims in multiple colors
      Glazelock® Window & Door Installation Flat Plate Shims — Multiple Colors & Thicknesses
      Glazelock
      from $45.13
      A bundle of natural pine pre-scored wood shims by glazelock inc with one loose shim visible
      Variety of glazelock shims including u-shaped snap-off and pre-scored natural pine wood shims in red and blue colors
      Glazelock® Natural Pine Pre-scored Wood Shims — 8" x 1-1/4" x 3/8"
      Glazelock
      from $13.80
      Assorted colors and thicknesses of glazelock shims U-shaped extended horseshoe 3-1/2 by 1-1/2 inch with 1/2 inch slot
      The image shows various glazelock shims including u-shaped horseshoe shims in red and blue with a 1/2 inch slot
      Glazelock® Extended U-Shaped Horseshoe Shims — 3-1/2" x 1-1/2" | 1/2" Slot
      Glazelock
      from $6.00
      Sold Out
      Assorted colorful plastic glazelock shims including square horseshoe shims 4x3 inches with 7/8 inch slot
      The image shows glazelock shims including u-shaped, snap-off, wedge-lock, and pre-scored wood shims in red and blue
      Glazelock® Square Horseshoe Shims — 4" x 3" | 7/8" Slot
      Glazelock
      from $87.30
      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
      The image shows glazelock shims including u-shaped horseshoe 3 by 2 5/16 inch in red and blue pre-scored wood types
      Glazelock® U-Shaped Horseshoe Shims — 3" x 2-5/16" | 3/4" Slot
      Glazelock
      from $11.08
      Sierra Grates white rectangular floor register with vertical slats and mounting holes for 2-way airflow use
      Sierra grates white rectangular floor register with vertical slats and mounting holes for 2-way airflow
      Sierra Grates White Rectangular Floor Register
      Sierra Grates
      from $17.99
      Three u-shaped glazelock shims in red blue and black with 2 by 1.5 inch size and 0.5 inch slot
      The image shows Glazelock shims including U-shaped, interlocking, snap-off, tapered, and multicolor pre-scored wood shims
      Glazelock® Compact U-Shaped Horseshoe Shims — 2" x 1-1/2" | 1/2" Slot
      Glazelock
      from $5.40
      Green u-shaped plastic glazelock shim with two rows of four square segments for stacking and spacing
      Black plastic u-shaped connector with stacked segments and circular indentations for glazelock shims stackable use
      Glazelock® Green Snap-Off Stackable Horseshoe Shim — 4-3/16" x 1-7/8"
      Glazelock
      from $61.81
      Black plastic seedling tray with multiple cells and tapered end used with glazelock shims for propagation support
      Black plastic glazelock shims with grid compartments and textured ridges in an 8 by 1-1/2 by 5/16 inch 288-pack
      Glazelock® Wedgelock Shims — 8" x 1-1/2" x 5/16" | 288-Pack, Plastic
      Glazelock
      $73.10
      A stack of black textured plastic glazelock shims with one tapered wedge separated below the stack
      Black tapered plastic glazelock shims in a boxed package labeled glazelock inc for wedge shim use
      Glazelock® GL-H8 Tapered Wedge Shims — 1-1/2" x 7-3/4" Plastic
      Glazelock
      from $47.83

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