Turn your Edge Guide Clamps into an oversized T-square with the T28936. The large 90° head slides right over the top of the Edge Guide Clamp head, and is fastened securely in place on to the clamp with two screws (included). Attach this 90° head to your Edge Guide Clamp and align it to the edge of your stock for quick and easy 90° cuts. Use with Edge Guide Clamps T28935, T28942, and T28943. Grizzly T28936 - 90 Deg. Head for Edge Guide Clamps