Milwaukee SHOCKWAVE™ Impact Duty™ 6" Magnetic Bit Holder is engineered with Custom Alloy76™ Steel to deliver exceptional wear resistance and is heat treated to maintain optimal hardness. This bit holder features a strong magnetic tip that ensures a secure grip on the drive guide, while the C-ring design keeps the insert bit firmly in place. Its durable two-piece construction is built to withstand the rigors of tough impact applications. Designed specifically for use with SHOCKWAVE™ Impact Duty™ Insert bits and Insert Magnetic Nut Drivers in sizes 1/4”, 5/16”, 3/8”, 7/16”, and 1/2”, this bit holder reliable performance for demanding tasks. Model Number: 48-32-4511