Description: 4pcs 90 Degree 3" Right Angle Mitre Corner Clamps Picture Frame Holder Woodwork Features: - Manufactured from Aluminum alloy with nickel painted plated screws. - Can be permanently mounted to a work surface. - Holds joints at a 90 Degree angle. - This clamp is constructed of durable Zinc alloy with steel threaded vise screws and two countersunk mounting holes for permanent installation on the bench. - 90°right angle clamp, holds joints at a 90 degree angle, whether you're simply gluing or using fasteners, this miter style clamp will hold stock firm and square at an exact 90 degree angle - Compatible: Fit for Woodworking, fish tank fixing, Picture Frame reinforcement, etc., generally used in a group of four.