About this item HIGH QUALITY MATERIALS: The square clamp is made of aluminum alloy and stainless steel, and the surface is treated with anodizing, which is corrosion-resistant, wear-resistant, and does not fade. The smooth and burr free surface of the L-shaped ruler and screws will not scratch your hands or wooden products. PROFESSIONAL WOODWORKING TOOLS: Aluminum corner clamp are a very practical tool that can make your woodworking projects easier. The main ruler for laser engraving scales has two measurement units, metric and imperial, which measure the length accurately and are easy to read. Can be used in conjunction with clamping tools to inspect and position the corners of the wooden board joints for right angle bonding or welding. WIDE APPLICATION: The 90 degree clamp is a multifunctional tool widely used by professional carpenters and DIY enthusiasts to make other furniture such as photo frames, cabinets, boxes, stools, etc. The L-shaped woodworking clamping square fixture can position the wooden board and maintain a perfect square shape. It can also be used for processing external corners, metal right angles, welding, and other professional operations. EASY TO USE: Simply place the 90 degree positioning square on the inner or outer corners of the flat two parts and secure them securely with a set of angle clamps. The unique design at the inner and outer corners ensures perfect verticality. Greatly enhances your ability to create true 90 degree angles. PRACTICAL CHOICE: This 5.5-inch woodworking clamp has 6 different fixing holes on each side, providing stronger clamping force while meeting the daily needs of woodworking. In addition to the basic 4x Positioning Squares& 8x Clamps, we also provided an additional pair of gloves and a pencil as a gift, which can better assist in completing the project. › See more product details