1. More convenient than separate clamps, can be directly locked into square wells 2. The knob which is large and easy to grip is sturdier than the circular handle on most fasteners 3. Use the clamp square to assemble the panel elements, more precisely, save time 4. The plastic woodworking right angle positioning device is used in scaling, precise measurement and convenient operation 5. With its small size, the ruler is easy to use, easy to carry, no need to worry about complex issues Specification: Item Type: Right Angle Positioning Clamp Material: ABS, Aluminum Alloy Scale: Approx. 140 x 140 mm / 5.5 x 5.5 inch Scale display: imperial and metric Color yellow Application: suitable for wood splicing, right angle positioning, etc. Package List: 1 x Right Angle Positioning Clamp 4 Fixing Clips.