RCBS 87305 Stainless Steel Dial Caliper Made of the highest quality materials Hunting reloading case prep tools Another quality Bushnell product Hardened stainless steel construction with matte, non-glare finish Range 0-6. 0.100 direct reading per revolution. 0.001 graduations Accurate to +/- 0.001 Four-way measurement capability: inside, outside, depth and step Shockproof movement for accurate measurements