Draper Magnetic Bit Holder Range - Draper 82407, 1/4" male x 1/4" female magnetic bit holder for use in power drills and driver handles. Shaft (male hexagon) from chrome vanadium steel hardened and tempered with the bit holder (female hexagon) cold forged from stainless steel. Display packed. Draper 82407 Magnetic Bit Holder (60mm) 1/4" (F) x 1/4" (M)