/ Precision Measuring Tools / Precision Hand Tools / Squares / Solid Squares / 20-12 W/SLC * Not actual product image 66900 20-12 Precision Square with SLC 66900 Other similar products Master Precision Square is the finest precision-checking non-graduated square with accuracy to .0001" (0.0025mm) every 6" (150mm). This hardened steel square is used when extreme accuracy is required. Features Specifications Contact Starrett Features The beams and blades are hardened, ground and lapped to ensure parallelism and straightness Made of high quality tool steel, with the finest of craftsmanship throughout The beam is grooved at the inner corner for clearance of burr or dirt Specifications Blade Length (in): 12" Blade Length (mm): 300mm Beam Length (in): 7" Beam Length (mm): 180mm Material: Steel