Milwaukee SHOCKWAVE™ Impact Duty™ 3/8" x 1-7/8" Magnetic Nut Drivers, 3-Pack are engineered for extreme durability, providing 30 times more life than standard nut drivers. Crafted from CUSTOM ALLOY76™ Steel and heat treated to maintain optimal hardness, these nut drivers feature a powerful magnetic tip that ensures a secure grip on fasteners. Designed with convenience in mind, each bit includes a color-coded ring for quick size identification, making them for cordless tool users. I for heavy-duty applications, these SHOCKWAVE™ Impact Duty™ Magnetic Nut Drivers also a comprehensive system solution for various drilling and fastening tasks. Model Number: 49-66-4525