Combination Square, Number of Pieces 1, Head Type CNC Machined, Blade Length (In.) 12, Graduation Type Stamped, Graduations 8ths, 16ths, 32nds, mm, Head Size (In.) 4, Head Material Cast Zinc, Black, Chip-Resistant E-Coating Finish, Steel Blade Material, Powder Coat Blade Finish, Durable Acrylic Vial, Reversible Head With Lock Bolt And Steel Screw, Includes Scriber RestrictionsCalifornia Proposition 65 Warning: This product contains a chemical known to the State of California to cause cancer. Warning: This product contains a chemical known to the State of California to cause birth defects or other reproductive harm.