All in One Clamp T-36 36-Inch Double Grip Bench Clamp w/T-track Twin Clamps are designed specifically for assembly projects but can also be used as a basic straight edge clamp One clamp faces down to hold your work table, the other clamp faces up to hold your project Pairs of Twin Clamps simplify assemblies and hold work pieces for planing or sanding Raised T-track accepts A, Twin, and Ultra series Saw Plate, Router Plate and Stop Block but will not work with Contractor series accessories Nylon jaws hold work piece securely and are predrilled for accessory Wide Jaws and Tall Jaws