INCRA 12 in. / 300mm Pro T-Rule is a supercharged version of the popular T-Rules, ing a wide range of precise measuring options. This rule features precision-engineered marking holes laid out in fractions of 16ths, 32nds, and 64ths of an inch, decimal inches in 100ths, and millimeters in 0.5 mm increments. It also includes height marking slots from 0 to 3 inches in 1/32 inch increments on the end, allowing you to line it up ly and place a 0.5mm pencil in the hole for dead-on marks. This ensures repeat measurements are exact and reduces eye strain. Made from durable stainless steel and proudly manufactured in the USA.