[High Quality]90 Degree Positioning Squares is made of high-quality plastic, with high cost-effectiveness and durability. [Corner Clamp Data]Right angle clamp lengths are 3inch and 4inch, screw length is 4inch, 16 sets of 90 degree positioning squares. [90 Degree Woodworking Tools]The 90 degree positioning square can be used with the clamp to position the joint angle of wooden boards for gluing or welding at right angles, making your work easier. [Widely Used]These right angle clips are professionally used for assembling boxes, drawers, cabinets, frames., Manufacturer: Akfldms