SPI Hardened Steel Square, 8-1/2 Blade – 14-575-5

SPI Hardened Steel Square, 8-1/2" Blade - 14-575-5 Accuracy Class 2 with Straight Edge Hardened to RC 55 Base and blades are accurately ground and lapped Beam is grooved at inner corner 8-1/2 Inch Long Blade 5-1/8 Inch Long Base 0.0017 Inch Accuracy Steel