Dasqua 0-300mm/0-12″ Metal Housing Large Screen Digital Caliper ~ Sturdy metal housing offers enhanced protection. ~ Stainless steel frame. ~ Silky smooth movement throughout. ~ Hardened, grounded and lapped measuring surfaces. ~ Four-way measuring for outside, inside, depth and step. ~ Reading is 0.01mm/0.0005″. ~ Accuracy is 0.03mm/0.0015″.