Benchmark Tools 388176 4 inch Precision Double Square 4R Graduations Accurate to +/- 0.002 inch Over Length of Blade Hardened Stainless Steel Blade (4" Double Square)

These handy double squares are indispensable for setting up machinery and for performing a host of shop layout tasks. They are manufactured in accordance with EEC Class 1 accuracy standards and are guaranteed to be square to within 0.002 (two thousandths of an inch) over the length of each blade. They have hardened and tempered no-glare satin chrome stainless steel blades. Blade marking are precision photo etched and then black filled for easy readability. Blades have quick Reading 4R markings (1/64ths and 1/32nds on one side and 1/8ths and 1/16ths on the reverse. Square heads are cast and then precision machined. Square head color is cobalt blue. Square heads lock down tight via locking knob. Squares come in a cardboard box.