Milwaukee Shockwave Impact Locking Bit Holder - The intuitive auto-locking design fits all inserts and 1/4 In. hex bits. The small-profile, quick release collar allows for easy one-handed bit tip changes. Bit holders offer two magnets to maximize magnetic transfer and holding power to the fastener and prevent drops. Features optimized Shockwave geometry to absorb peak torque and prevent breaking. - Length: 2-7/8 In. , Shank Size: 1/4 In. Hex, Magnetic: Yes, Pig Qty: 1, Package Type: Hang Tag