4pcs 90 Degree 3" Right Angle Mitre Corner Clamps Picture Frame Holder WoodworkDescription: 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. 90right angle clamp, holds joints at a 90