Attaching a face frame to a cabinet carcass， assembling drawers， shelving and other situations where you need to join workpieces at 90 deg. angles is a snap with the right angle clamp. Automaxx technology adjusts automatically to material thickness. It features a steel pin on one arm that fits snugly into 1 pocket hole to clamp the pieces together as you drive a screw into an adjacent hole. Using a right angle clamp is like having a helper on hand to hold materials at a perfect 90 Degree.