Features Hollow shank nut driver sets allow for tightening or loosening of fasteners from either the bolt or nut end due to more clearance inside the driver. The hollow shank fits over longer bolts and studs than other nut drivers. These nut driver sets come with an assortment of nut drivers to fit a range of fastener head sizes. Tip Size / 1/2 in, 1/4 in, 11/32 in, 3/16 in, 3/8 in, 5/16 in, 7/16 in Bolt Clearance / 2 51/64 in, 2 55/64 in, 3 55/64 in Shank Length / 4 in Grip Style / Molded Measurement Type / SAE Nut Driver Style / Hollow Shank Fastener Holding / No For Fastener Size / 3/16 in, 1/4 in, 5/16 in, 11/32 in, 3/8 in, 7/16 in, 1/2 in ESD Safe / No Insulated / No Magnetized Tip / No Non-Magnetic / No Non-Sparking / No Ratcheting / No Replaceable Shank / No Tether Ready / No Shank Shape / Round Shank Material / Alloy Steel Shank Diameter / 0.32 in, 0.38 in, 0.45 in, 0.51 in Handle Type / Ergonomic Handle Shape / Straight Handle Material / Multicomponent Size Color Code / Black, Blue, Brown, Green, Orange, Red, Yellow Number of Pieces / 7 Corrosion Resistant / Yes Handle Color / Black, Grey Hex Size / 1/2 in, 1/4 in, 11/32 in, 3/16 in, 3/8 in, 5/16 in, 7/16 in Standards / ASME B107.12 Container Type / None