Torque Master's Tool kits are specially matched to meet tool storage needs of professional mechanics and service technicians. These are very carefully designed set structure to offer both an effective means of tool storage and a showcase appearance. Hex Adaptors are used for tightening of sockets cap screws and bolts. These are available in ¼" to 1" square drives to cover across flat sizes from 3mm to 36mm and 1/8" to 1 1/8" in standard and extra lengths for manual as well as impact use.