Fowler, 10-1/2” Straight Edge Square, 52-431-010-0

Features: • Length of the blade is measured from the inner edge of beam to end of blades. • Squares fully hardened to Rockwell 55C. • Beams and blades are ground and lapped for straightness and parallelism. • Both the inside and outside of the squares have accurate right angles. • Packed in individual cartons. • Designed for precision layout and measurement work which requires high accuracy. • Accuracy = .0002" + Length/50,000 (blade)