ITEM NAME:3pcs Magnetic Bit Holder Extensions Quick Change 1/4" Hex Shank Tool 75-150mm JR #aucsearchbutton #aucsearchbutton:hover { cursor: pointer;.Extensions in lengths 150mm & 100mm & 75mm for superior access for hard-to-reach fasteners. 1pc 150mm Hex shank. 1pc 75mm Hex shank. 1pc 100mm Hex shank. 1/4" quick-change hex shanks fit all power drills, 1/4" impact drivers and hand-held drivers.