Durable and Rustproof Material: Solidly constructed of die-cast aluminum, rustproof red mask on the outside, this angle clamp is sturdy and durable. Set of 4 Angle Clamps: One package includes 4 right angle clamps, for common daily use. Save working time and reduce working difficulty. Independently adjustable rotary jaw: only need a finger to rotate the screw, to adjust to different clamping ranges, suitable for different thickness of work pieces. Maximum clamping range: 77mm, perfect for holding a joint at a 90 degree angle, can also be used for a 45 degree clamp. Multifunctional use: perfect for woodworking, aquarium fixing, connecting cupboards and furniture, reinforcing frames, mounting projects on wood, etc.