The Klein 70573 Hex Key Set ends are square-cut for a secure, full-depth fit and maximum contact with the hex socket which works to prevent slippage and stripping of the socket while in use. Sizes are: 5/64-Inch, 3/32-Inch, 7/64-Inch, 1/8-Inch, 9/64-Inch, 5/32-Inch. Handy sets fit your pocket or tool box easily and help eliminate the lost-key problem.