Square Ruler 90 Degree Positioning Squares Right Angle Clamps L Type Corner Clamp Locator For Picture Frames Boxes Cabinets The product is shipped based on the color or size of the main image of the product page. Name:square Ruler 90 Degree Positioning Squares Right Angle Clamps L Type Corner Clamp Locator For Picture Frames Boxes Cabinetsmaterial: Aluminium Alloyweight:150gsize:100x100x16mmpackage Included: 1 X Square Ruler Features:1. This Ruler Made Of Aluminum Alloy Material, Is Wear-resistant, Rust-proof, Durable And Hard To Break.2. It Can Work With A Clamping Tool To Check And Position The Corner For Wood Board Jointing To Gluing Up Or Welding At A Right Angle. It's A Very Practical Tool To Make Your Woodworking Project Easier.