The Loc-Jaw system for fourth and fifth axis machining is said to require no material preparation. The rails and gripper towers are serrated to provide a solid and adjustable base. The Loc-Jaw features 0.5" to 4.0" clamping range and is capable of penetrating 0.060" deep per gripper, producing more than 6,000 lbs of holding force. The low-profile grippers hold on 0.100" to enable full access to work surfaces, including the bottom face. A centering disk can be mounted to the bottom of the base for quick location on faceplates that are equipped with a centering hole. The base is also configured with two drill bushings for precise locating, using the included diamond and tapered pins.