6" Johnson Combination Square

The Johnson 6 in. Combination Square features computer-machined edges for accuracy. Its cast-zinc head slides along the square's blade and it can be locked into position to help transfer and hold a distance while you draw a line.Graduations in in. and mmComputer-machined gauging edges for accuracySteel blade with permanently stamped graduationsCast-zinc head slides along blade and can be locked into positionYellow acrylic vialHardened, screw-in scriber won't fall out