Accuracy vernier caliper while the easy and this metal measuring tool with accurate scale is to use This vernier caliper steel provide you with 2 measuring that 0-5inch & 0-120mm 4 way measuring caliper tool: internal, external, depth and step measurements Professional precisions measuring tool for industrial use, totally different from hand measuring Locking screw feature for batches measuring go / no go process, Manufacturer: Kaeltsyn