General Tools 142 6-Inch English and Metric Plastic Dial Caliper High-strength fibreglass-reinforced plastic (FRP) body for durability; includes a fitted, molded storage case Caliper dial and bar have graduated inch and millimeter readings; measures up to a maximum of 6 inches (152 mm) No-glare, easy-to-read dial with adjustable bezel is colour-coded to highlight fractional inches Delivers accurate readings of inside, outside, depth and step measurements Freewheeling friction roller provides effortless and accurate readings