12", 4-Piece Precision Combination Square.

Fully hardened steel
Satin chrome finished blade
Graduated in 8th, 16th, 32nd and 64th
Protractor scale graduated from 0-180 in both directions
Square/Miter head feature level vial and hardened scribe tool
High precision engineering standards
Blade: Straightness/Parallelism .0006"/12"; End Squareness +/- .03 deg/90 deg
Square Head: Squareness .005"/12"; Miter: .005"/12"
Center Head: Square to side .001"; Tolerance +/- .07 deg/90 deg
Protractor: Graduation on dial 0-180/180-0; Tolerance<.08 deg/90 deg

Warning: Cancer and Reproductive Harm. www.p65warnings.ca.gov