1、Made of aluminum alloy material, adopts anodized surface treatment , corrosion-resistant. 2、Built to strict quality control standards, suitable for boxes, shelves and outside corners. 3、Designed to be clipped on boxes, photo frames, etc. And right‑angle ruler is improved for more durability. 4、The 90° right-angle corner clamp keeps the joint at a 90° angle, whether you simply glue or use fasteners, it will not damage the fragile cutting edge. 5、With exquisite craftsmanship, light and practical right-angle ruler's quality is guaranteed, you can use it with confidence. 2 x Ruler4 x Clamp Item Type: Right-angle rulerMaterial: Aluminum alloyPanel Fixing Clip Thickness: Approx. 9 ~ 40mm / 0.4 ~ 1.6inSize: Approx. 110 x 110mm / 4.3 x 4.3inApprox. 140mm / 5.5in