ALUMINUM ALLOY: The body part of this Woodworking Corner Clamp has taken the material of aluminum alloy, with die-casting construction, which is more durable and sturdy but lighter to hold in hand, can ensure a long time use life.***A GOOD HELPER: This double handle 90 degrees right angle clamp can be used in making cabinets or box-frames, and when you're trying to glue pieces at right angles, the durable right angle aluminum alloy clamp can be used as extra hand.***QUICK RELEASE : clamps include a quick release button that allows for a fast open and close function for adjustments, as well as instant release of your work pieces***WIDELY USED CLAMP: This 90 Degree Single Handle Right Angle Clamp can be widely used for aligning many sorts of work, frame, case, cabinets, fences, shelving, fixtures, tool-box and other woodworking crafts.-----################