IVY Classic 45642 12-Inch Rapid Reload Power Bit Holder, 1/Card Holds any 1/4-inch hex shank power bit in place by ball and spring retention, Rapid Reload (Registered Trademark) Ideal for use with hex shank power insert bits and hex power shank wood spade bits Tapered head allows extension to pass through 5/8-inch hole High-carbon steel black oxide finish Length: 12, Shank: 1/4-inch hex power