NUTDRIVERS *Drive Size: Assorted in. *Metric or SAE: SAE *Hollow Shaft: Yes *Product Type: Nut Driver Set *Overall Length: 7 in. *Number in Package: 7 pc. *Drive Type: Hex *Color: Black *Packaging Type: Clamshell *Shaft Length: 3 in. *Magnetic Tip: No *Comfort Grip: Yes *Universal driver head fits 4X more fasteners *Removes rusted and stripped bolts *3 in. hollow shaft design is ideal for long bolts or threaded rod applications *Wrench Ready hex shanks deliver additional leverage *Chrome plated for marine grade rust protection *Forged steel shanks provide longer life and more durability *Deepwell sockets *Multiple ID Markings allow for quick tool identification on jobsite *Sizes include 1/4 in., 5/16 in., 11/32 in., 3/8 in., 7/16 in., 1/2 in. and 9/16 in.