Usage Tips:High-quality material-aluminum alloy, anodized red surface. The clamping block is a firm, sturdy and precise clamping solution.It is easy to carry, easy to operate, and will not damage the edges. Suitable for wood, metal right angle and 90 degree welding, etc.150mm, right angle & multi-angle designed to be clamped in boxes, photo frames, cabinets and outer corners, etc. When installing fasteners, adding additional functions or simply visualizing your design, keep large panel items in perfect alignment.Right-angle fixtures can be used as right-angle molds to quickly make frames, right-angle frames, and right-angle corners. It also can be a ruler to use.The beveled edge is easy to handle and will not damage the fragile cutting edge. Comfortable to hold in your hand. Specifications:Material: Aluminum Alloy Ruler Size: approx 150x150x206mm/5.91x5.91x8.11 inchesLocking Clip Size: approx 95x20mm/3.74x0.79 inchesStainless Steel Screw Size: approx 33x62mm/1.30x2.44 inchesType: 1x 150mm ruler/2x 150mm rulers/1x 150mm ruler with 2 clamps/2x 150mm rulers with 4 clamps Note:1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package Includes:1x 150mm ruler2x 150mm rulers1x 150mm ruler with 2 clamps2x 150mm rulers with 4 clamps