Groz Cold Chisel 3 4In X 7In Punches & Chisels Cold Chisels Fully Insulated 01mm graduations Inside Micrometer set 01mm graduations Inside Micrometer set Interchangeable Rod Style 3 extension rods included Each interchangeable extension rod is marked with its measuring range For models supplied with more than one rod Mitutoyo USB Input Tool Direct Cable for Coolant Proof Micrometers (replaces 06ADV380B)Data USB Input Data Cable converts data from the caliper to be read directly in Microsoft Excel via a USB port Data can be further enhanced by using Mitutoyo USB ITPAK Software IP67 Protection Hardness at the striking end is maintained to under 42 HRC so that the head will not splinter when subject to hammer blows Shank is powder coated and the cutting edge is accurately ground