The 7-pc Hollow Magnetic Color-Coded Ratcheting Power Nut Driver, No. 32950, from Klein Tools includes six color-coded hollow power nut drivers (1/4", 5/16", 3/8", 7/16", 1/2", and 9/16" hex sizes) and a ratcheting handle for easy one-handed driving. The 3.75" hollow core facilitates work on long bolt applications, while the 5" sturdy shaft helps with extended reach and access. rare-earth magnets retain fasteners for one-handed driving, with magnet size increasing with each hex size.