The Tiny-T is has T-square capability, 64ths running horizontally across the rule and 28ths vertically. Made of sturdy stainless steel, the Tiny-T has exclusive Micro-fine Guide Holes to locate your mark exactly on target. It is like a combination square thats always set to every measurement and far more accurate. Use the 64ths for ultra-high resolutionT-bar is adjustable for making precise vertical measurements. Precision T-square capabilities for marking at right angels to the edge of your work. Any INCRA rules can be used for marking on metal. When accuracy counts - INCRA RULES.