Starrett 55-4-1/2 Hardened Steel Master Precision Square with Beveled Edges, 3-1/2-inch Beam Length, 4-1/2-inch Blade Length

This hardened steel square is used when extreme accuracy is required. The beams and blades are hardened, ground, and lapped to insure parallelism and straightness. The blades are beveled on both edges of each side, which provides an excellent visual line contact with the work. Made of high quality tool steel, with the finest of craftsmanship throughout.

Features

• Made of high quality tool steel
• Squareness accuracy to 0.0001-inch (0.0025mm) every 6-inch (150mm)
• The beam is grooved at the inner corner for clearance of burr or dirt
• Length of blade from the inner edge of the beam to the end of the blade
• The square has special screws to secure the blade to the beam