6 3 4 straight edge square 52 431 006 0
â€¢Â Length of the blade is measured from the inner edge of beam to end of blades.
â€¢Â Squares fully hardened to Rockwell 55C.
â€¢Â Beams and blades are ground and lapped for straightness and parallelism.
â€¢Â Both the inside and outside of the squares have accurate right angles.
â€¢Â Packed in individual cartons.
â€¢Â Designed for precision layout and measurement work which requires high accuracy.
â€¢Â Accuracy = .0002″ +Â Length/50,000 (blade)
*Image shown for representational purposes only
Blade Length:Â 6-3/4â€³
Beam Length:Â 4â€³