Rubik 90 Degree Angle Clamps are designed for woodworking and frame corner clipping. This set includes 4 adjustable right angle clip fixer hand tools, perfect for aligning, nailing, woodworking, welding, screwing, making cabinets, boxes, and picture frames. These clamps are suitable for fixing 5-22mm/10-22mm boards and can quickly and easily assemble shelves. They are also ideal for woodworking, cabinet and furniture repair connections, photo frame reinforcement, and other wooden DIY projects.