High Quality Materials: The material of Corner Clamp Square is aluminum alloy, the surface is electroplated, it is not easy to rust and wear, it has a long service life and is easy to transport. The Perfect 90 Angle: Creating 90 degree right angle joinery will be a breeze, so ensuring a project result is essential balance. Fasten the squares quickly and easily. Suitable for wood / metal at right angles / welding / 90 degree welding. Practical Design: The inside corners are rounded outwards to allow a slight protrusion at the corners of the square. Provides two countersunk holes for 1/4" bolts and a large sliding surface for securing to the work surface as needed. Metric and Imperial Sizes: The scale is accurate, durable, and easy to read, right angle woodworking jig so can be used for many years.120 x 120 x 16 mm (4.72 x 4.72 x 0.63 inch) Place a square in the corner of the two pieces you have need to square and secure with a set of pliers, very easy to use. Versatile Use: With our 90 degree positioning pliers you have exactly what you need to create square boxes, drawers , cabinets, frames, furniture, etc. Some woodworkers even find it useful to incorporate them into their jigs and fixtures.