?FEATURES:3? reach; clamps materials up to 3? thick (76mm)Adjusts automatically to match material thicknessEasy-to-regulate pressure with a simple thumbscrewLarge clamp faces spread pressure evenlyErgonomic padded grips prevent hand fatigueWorks with the Kreg Pocket-Hole Jig, R3 Clamp Pad Adapter, 300-Series Pocket-Hole Jigs, as well as the Portable Base