【Premium Quality】Made of aluminum alloy. Made from solid aluminum block. Surface treatment: anodized blue surface, corrosion resistant 【90 Degree Positioning Square】The 3D woodworking ruler is equipped with clear inch and millimeter graduations to measure and position the length more accurately. Suitable for welding wood, metal, right angle and 90 degree, etc. 【Easy to Use】This L-shaped connector is easy to use. This unique woodworking tool can be stretched to the inside and outside corners of the workpiece. 90 Degree Right Angle Clamps attach to your bearing with F terminals (not included) or C terminals (not included). 【Widely Used】Designed to be attached to cartons, picture frames, shelves, outside corners, etc., to help with alignment when gluing. Note: The data are all measured manually, please allow 1-3cm error, due to differences in light and display, there may be some color differences, please refer to the actual item received.