DeWalt Impact Bit Holder Extreme FlexTorq Torsion Zone Magnetic 1/4" HexStrong Magnetic Hold to prevent the fastener from dropping. Ideal for one-handed useSpring Loaded Quick-Lock for quick and easy bit changeOptimised Torsion Zone flexes with the torque of the impact driver to absorb torque peaks and protect 25mm bits from breakageLonger Life on 25mm screw driving bits when used in conjunction with the torsion zone holder versus the standard holderStainless Steel Sleeve for improved fastener stability and controlImpact Ready Shank maximises resistance to wear and shock