Features: Selected from engineering plastic, lightweight and high strength The screw fixation and stable clamping adopt the method of screw fixation, and the clamping tightness can adjusted. Can move and hold materials of different thicknesses, with clamping ranges of 1-22MM that can adjusted as need. Widely applicable scenario to meet your usage needs and help you solve various measurement and marking need. Perfect for applications such as frame assembly, furniture joining, and woodwork adjustments, guaranteeing right angles in every project. Specifications: Component:Plastic Type:1PC/4Pcs Size:Approx.84mm/3.31inch Package Includes: 2 Optional Package: Package 1 Include:1Pc Corner Clamp Package 2 Include:4Pcs Corner Clamp note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the Pictures may not reflect the actual of the item.