Pro-Grade 2-in-1 Quick Change Magnetic Bit Holder Hex Premium-grade power & hand tool accessory designed to help you work more efficiently Power driver bit holder has cam mechanism that locks quick-change bits in place Plus strong magnet for holding non-quick change bits; excellent quality - made in Taiwan Stainless steel holder, hardened tool steel shank and quick-change collar; for all 1/4" hex bits 2-1/2" length overall, 1/4" hex shank fits all drill chucks, impact drivers