1[Easy Operation] This clamps are suitable for thickness from 2.22 cm to 3.98 cm. The 90 degree angle can provide a powerful balance. 2[Durable Sturdy] Made of high quality aluminum alloy and stainless steel, these wood clamps are anti rust, anti corrosion, durable and sturdy. 3[Beveled Edge Design] The beveled edge design of the right angle clamp is easy to operate and will not damage the fragile cutting edge. 4[Using Method] Place the clamps on the corner of the two pieces of materials that need to be leveled and fixed, and fix it with a set of fixtures. 5[Wide Use] This woodworking fixture set can be used to fix and assemble furniture cabinets, photo frames, boxes, etc. to keep the items in a square. Item Type: 90 Degree Positioning Squares Material: Aluminum Alloy Suitable Thickness: Approx. 2.22-3.98cm / 0.87-1.57in Color: Black Wood Clamps Accuracy: Approx. 1mm / 0.04in Usage: Can Be Used for Woodworking and Right Angle Welding, Used for Joining and Gluing Wood Boards, Making Right Angle/Right Angle Frames/Photo Frames, etc., Making Your Work Easier and Simple, Positioning Panel Clamping Tools 90 Degrees L Shape Right Angle Clamps 90 Degree Clamping Squares Tool 2 x 90 Degree Positioning Squares 4 x Calipers 4 x Adjust Fixing Block Please wipe it clean after use in a humid and corrosive environment to avoid damage and rust.