Fowler 52-426-004-0, 4" Bevel Edge Square

Features Squares have accurate right angles both inside and outside. Made from a single piece of fully seasoned tool steel. Matte finish Beams and blades are ground and lapped for straightness and parallelism. Blades beveled both edges of each side. Squares fully hardened to Rockwell 55C. Packed in individual carton. Designed for layout & measurement work. Accuracy = .00008" + Length/100,000 (blade)