Super Lock sockets use a unique design meaning the greater the torque applied, the more they will grip the nut or bolt. Very handy for removing stubborn, worn or rusty nuts and bolts.1/4" Drive: 6, 7, 8, 9, 10, 11, 12 & 13mm3/8" Drive: 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18 & 19mmCR-V
