Milwaukee 48-22-2434 7mm Hollow Shaft Nut Driver. Milwaukee has created a large line of heavy-duty hollow nut drivers designed for both residential and commercial applications. These rubber handle nut drivers come in all shapes and sizes, and multiple ID markings for quick tool identification on jobsite. The Milwaukee 7mm Hollow Shaft Nut Driver features an universal driver head designed to fit 4X's more fasteners including: Square, Hex, 12 point and Spline fasteners, and a deep well socket. This Nut Drivers also includes a forged and chrome plated wrench ready shank, and Milwaukee's Limited Lifetime Warranty.