Machine divided and engraved from master for extreme accuracy. Made of hardened stainless steel throughout, ground and lapped for accuracy. Stepped jaws for inside measurements. "Double Spaced" vernier scales with easy-to-read, clear graduations on the satin chrome finish. Longer jaws permit greater accessibility and simpler measurement of larger workpieces. Fine adjustment screw. Fitted case. The tool you are ordering is a "heavy-weight" item that requires a freight quote. Once your order is submitted, we will contact you with more details.