Used for installing hexagon headed fasteners with a power tool. Also known as a 1/4" nut setter. Shank Dia. inch: N/A Socket Size inch: N/A Socket Size mm: 10 Drive End Square: N/A Length mm: 65 To Fit: 10mm fastener Shank Type: Hex Finish: Self Colour Material: S2 Hardened Carbon Steel Timco Magnetic Socket Driver Bits - Hex (Size 10 x 65 - 15 Pieces) in Clear