High quality material: aluminum alloy. Machined from a solid block of aluminum. Lasts for years. Anodized red surface treatment, corrosion resistant. Professional and easy-to-use design: Designed to attach to boxes, picture frames, shelf cabinets and for outside corners, etc., to help square when gluing. Place a square in the corner of the two pieces you have need to square and secure with a set of pliers. Available in 12 cm, and delivered in a set of two. Wide Application: Set of right angle woodworking pliers for professional use for assembling and DIY slamming boxes, drawers, cabinets, frames, furniture, etc. Perfect for shelf cabinets. Hold a perfect square while assembling picture frames, cabinets, or just about any box Professional Woodworking Tools: Designed to attach to boxes, picture frames, shelf cabinets and for outside corners etc to help square when gluing. It can work with clamp tool to check and position the corner for gluing and gluing. It can be used for woodworking and right angle welding. 90 Degree Angle Ruler: 3D woodworking ruler with clear inch and millimeter scale to measure length for more accurate positioning.