Mitutoyo 532-119 Brand Vernier Caliper with Fine adjustment 150mm / 6 inch Model 1.Hardened stainless steel construction with satin chrome finish, for protection of caliper. 2.Four-way measurement capability for outer dimension (od), inner dimension (id), depth, and step measurements. 3.Fine adjustment carriage to control slider movement for precision measurements. 4.Raised sliding surfaces for preventing defacement and wear of scale graduations. 5.Meets federal accuracy specifications ggg-c-111b.