- adjustable clamping design with a strong clamping spring provides quick, secure clamping of wood pieces. suitable for thickness 3/16 inch to 3/4 inch (5-22 mm) and offers 60-, 90-, and 120-degree right-angle clamps, with a T-shaped connecting plate for assembling two pieces of different thicknesses - sturdy spring fixes boards and frames at a 90 degree angle, useful with screws or plywood, and holds pieces in place during assembly, clamping, or gluing - durable materials deliver high strength and long service life with repeated use, resisting damage over time - convenient operation allows one-handed opening of the right-angle clamps while the other hand fixes and positions the workpiece - suitable for small wooden DIY projects such as building wooden boxes, photo frames, poultry houses, mailboxes, and dressing table drawer components; also useful for repairing and connecting furniture and cabinets