This is for a brand new unit still sealed in packaging. The Mitutoyo Digimatic 293-960-30 OD Micrometer Set is designed for measuring outside diameters with a range of 0 to 3 inches and a resolution of 0.00005 inches. The set includes a digital readout for accurate measurements and is ideal for applications in CNC, metalworking, and manufacturing industries where precise measurements are crucial.