INSIZE Coolant Proof Caliper Features include... 0-12" / 300mm Measuring Range 0.0005" / 0.01mm Resolution Coolant Proof, IP67 Rated Protection Buttons: zero / on/off, inch/mm, ABS/REL, hold Battery CR2032, includes one spare battery DIN862, hardened stainless steel construction With locking clamp and thumb wheel for outside, inside, depth and step measurements Supplied in fitted storage case Includes Inspection Certificate