Milwaukee® Shockwave™ Impact Duty™ Locking Bit Holders Are Engineered to Be The Most Durable, Strongest Locking Tip Holders On The Market. The Intuitive Auto-Locking Design Fits All Inserts and 1/4 In. Hex Bits and The Small-Profile Quick Release Collar Allows For Easy One-Handed Bit Tip Changes. The New Locking Bit Holders Feature Two Magnets to Maximize Magnetic Transfer and Holding Power to The Fastener and Prevents Drops. As With All Shockwave™ Impact Duty Accessories, Each Bit Holder Features and Opti