DRILLPRO 3pc Magnetic Bit Holder Set Extensions - 2'' 4'' 6'' Quick Change 1/4'' Hex Shank for Electric Screwdriver Drill Bis Must-have accessory set for power drills and impact drivers Strong permanent magnets hold bits securely in place; accepts all 1/4" hex-shank bits Extensions in lengths 6", 4" &3" for superior access for hard-to-reach fasteners 1/4" quick-change hex shanks fit all power drills, 1/4" impact drivers and hand-held drivers Hardened tempered tool steel with chrome-finish holders manufacturer's lifetime warranty