Pinnacle 4" Double Square
This 4" double square offers the accuracy of engineer's squares with the adjustability common to larger combination squares. Use this tool for machine and jig set-up or laying out joints. It features a fully hardened and satin finished blade with easy to read, etched and black filled, micro-fine graduations in 8ths, 16ths, and 64ths. The cast iron head is precision ground to federal specification.