Product Summary

GRK Fasteners offer a line of specialty fasteners and accessories that include:

• Top Star™ Adjustable shim screw is a screw within a screw that allows you to install wooden doors or windows without the use of shims.
• Caliburn™ Concrete Screws heavy duty concrete and masory fasteners are professionally engineered with a patented thread design for ease of driving the screw into concrete and similar applications.
• MSS™ Metal Siding Screw has powder-coated head for a clean, finished look, this screw has an integrated washer-head and is complimented by a rubber washer below the screw head. This feature also helps protect the washer from prolonged exposure to the sun for long-lasting, secure siding installations.
• GRK Star Drive Bits provide six points of contact with our star drive head screws. The star drive helps to eliminate stripping for improved productivity.