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.
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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
- How to Shim a Door Frame the Right Way
- How to Shim a Window for a Perfect Fit
- How to Use Plastic Shims for Window and Door Installation: Tom's Step-by-Step Guide
- Plastic Shims vs. Wood Shims: Which Should You Use?
- Why Small Installation Mistakes Turn Into Big Home Problems Later
- GlazeLock Shims: The Installer-Driven Innovation Changing Window & Door Installation