The Kreg Bench Klamp Insert Plate quickly adds multiple clamping locations to your workbench. Made of thick, hard-anodized aluminum for durability, the plate measures 3-by-4 inches and is 1/4-inch thick. Designed specifically to work with the Kreg Bench Klamp, this insert plate comes with all mounting hardware and instructions necessary for easy installation and is backed by a 30-day warranty.