Collet, Tap Size 5/16 In., Compatible with Product Type ANSI Taps, Coolant Fed Non-Coolant Through, Features Automatically Stops Spinning when Bottom is Reached, Prevents Broken Taps, For Shank Type ANSI Tap Shank, For Use With ANSI and Metric/ANSI Shank Taps: 5/16 in, M7, M8