The MILWAUKEE® 7PC SAE HollowCore™ Nut Driver set includes 1/4., 5/16., 11/32., 3/8., 7/16., 1/2., and 9/16. sizes. These nut drivers feature a HOLLOWCORE™ Shaft, which delivers unlimited depth in threaded rod and long bolt applications. The color-coded markings allow for easy size identification and the wrench-ready steel shanks provide additional leverage for tougher applications. Milwaukee® HOLLOWCORE™ Nut Drivers are backed by Milwaukee's Limited Lifetime Warranty.