LCD readout digital calliper with a capacity of 6inches / 150mm manufactured from hardened stainless steel.Display instantly switchable from metric to imperial.Resolution 0.01mm(0.0005 inch) Display: inches to 1/1000THS mm to 1/100THS.A zero button enables reading to be reset to zero at any position.Integral thumb roller assists with fine adjustments thumbscrew allows jaws to be locked.Auto-off after 5 minutes. Powered by a single SR44 Cell. Complete with storage case and operating instructions.