Features: * Use to check the size of drill bits, sockets and other items that are either metric or fractional * 0-6 in./0-150mm range * .0005 in./64ths/.01mm graduations * Easy to read digital display with inch/inch fractional/metric conversion * 4 measurements - inside, outside, depth, and step What"s In The Box: * Central Tools 3C350 Fractional Electronic Digital Caliper