Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! [the two-sided ruler] On both sides of the right angle clamp, there are precise inch and millimeter scales that can be used as rulers during work, making your operations more effortless. [Full aluminum alloy material] Our right-angle clamp is made of high-quality aluminum alloy material and aluminum alloy clips, with a surface treated by anodization, which is rust-proof, durable, corrosion-resistant, and can be used for a long time. [Size and packaging] This 140mm/5.5 inch square set is a very scientific and appropriate length size selection. It is suitable for materials with a thickness of no more than 55mm (2 inches). The package includes two 90-degree positioning squares of 140mm(5.5 inch) and four bases, clamps, and fixing nuts. [Widely applicable] This 140mm woodworking right-angle clamp is specially designed for assembling boxes, drawers, cabinets, frames, furniture cabinets, and more. At the same time, this woodworking clamp has precise scales and can be used as a ruler. It is very suitable for the square of shelf cabinets and can keep square when assembling frames, cabinets, or any boxes. size: 140mm Material: Aluminum alloy colour: Blue Package Contents: 2 x Right Angle Rulers 4 x Jigs Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.