4 straight edge square 52 431 004 0
• 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)
*Image shown for representational purposes only
Blade Length: 4”³
Beam Length: 3”³