Included: 4 Pack "3"and 4 Pack "4" Corner Clamp and 8 Locking clampsMaterial: PolypropyleneColor: OrangeItem length:3in(3*2)/(8cm*5cm), 4in(4*4)/(10cm*10cm)1.2 Different Sizes: 90 Degree Corner Clamping Square Set includes right angle clamps 3" x 4pcs, 4" x 4pcs, and L clamps x 8pcs. for more woodworking workpieces. Applicable to any thickness of wood. Can also be used for securing small picture frames where other large squares unable to fit it.2.Wide Application: You'll have what you need to create square boxes, drawers, cabinets, cabinet carcasses, picture frames, face frame, etc. This is also a great gift for woodworkers.3.Sturdy Material: Featuring a high-impact materials construction that insures optimal and lightweight usability. They will maintain their squareness and not flex even under the load of larger assemblies.4. Easy to operate: Use the aluminum angle clamp to adjust the wood to the correct position, then tighten the wood and angle clamp with the L-shaped metal screw and plastic nut to complete the work. Suitable for plates with a maximum clamping thickness of 1 cm, and supports both metric and imperial units of measurement.5. How to use: 90 Degree positioning squares can be used with clamps to locate the angle of the joints of wooden boards so that they can be glued or welded into right angles. They can also be used with 90 Degree clamps and fixtures. They can be fixed to the corner pieces with spring clips or small F-type clamps, suitable for internal and external corners.PP