High Quality MaterialPlastic structure with high impact force ensures the best durability and lightweight use. Quick Solution+-0.5 degree (90) tip is professionally designed to protect your fingers and make work safer. Using A-type clamps, F-type clamps, heavy-duty clamps, quick clamps and other woodworking clamping tools, it can effectively clamp 90 degree right angle squares and quickly make frames photo, frames at right angles, right. angles, etc. Multiple SizesThere are two size combinations of 3", 4" and 6". Different sizes can be used for more woodworking parts, and various combinations can meet your different needs. Perfect 90 AngleCreating precise 90 angle wood products is very easy, and essential to ensure a balanced project result.Clips quickly and easily onto a square. br>Quick MeasurementThe scale has high definition and is not easy to wear.Near the center of the position ruler, there are 45 degrees and 22.5 degrees to quickly measure the angle.