Quickly change between 5/16 and 3/8 hex sizes with Malco's unique, exclusive,
dual-sided magnetic hex drivers. The reversible hex socket fits over a 1/4-inch
magnet-tipped, ball locking hex shaft, and can be quickly reversed to change
sizes. Eliminate troublesome buildup of metal shavings in the hex tip with the Easy Clean Magnet. Just swipe with a glove or shop towel to clear any metal
shavings. Tested torque of the reversible hex chuck driver design is equal to
one-piece drivers.