The secret of T Square is the tight index pin with a series of precision-machined index holes and spring-loaded tolerances that engage in it. The pin snaps into place giving you the peace of mind of knowing that it is in the exact position Made of aluminum alloy, this ruler is lightweight yet sturdy, ensuring long-term reliability Home improvement, woodworking project, or this angle ruler is an essential tool for accurate measurements and cutting wood Suitable for woodworking enthusiasts, home improvements, enthusiasts who need measurements and precise angles Discover the versatility of our Aluminum Alloy Multifunctional Woodworking Combination Angle Ruler, Manufacturer: Pffiocix