Must-have accessory set for power drills and impact drivers<br />Extensions in lengths 150mm for superior access for hard-to-reach fasteners<br />Strong permanent magnets hold bits securely in place; accepts all 4 inch hex-shank bits<br />4 inch  quick-change hex shanks fit all power drills， 4 inch impact drivers and hand-held drivers<br />Hardened tempered tool steel with chrome-finish holders<br /><br />Package Included:<br />1pcs Hex shank