SHOCKWAVE-Locking-Bit-Holder-305mm-Milwaukee-Power-Tools-4932472068-p-The-Milwaukee-SHOCKWAVE-trade-Locking-Bit-Holder-is-made-from-custom-engineered-steel-&-heat-treated-for-maximum-strength-&-flexibility-Auto-Locking-one-handed-bit-release-The-optimised-SHOCK-ZONE-trade-absorbs-up-to-3x-more-torque-for-more-resistance-to-shock-from-impacting-Dual-internal-magnets-ensure-magnetism-to-fasteners-p-p-Suitable-for-high-torque-&-impact-applications-1-4in-Hex-reception-DIN-312