Change between 1/4 and 5/16 hex sizes fast with Malco's unique, dual-sided magnetic hex drivers. This patented design can be quickly reversed to change sizes. The reversible hex socket fits over a 1/4" magnet-tipped, ball locking hex shaft. For cleaning, just swipe away metal shavings with your glove or a shop towel. Torque is tested and equal to one-piece drivers!