These 1/4" drive SAE power sockets come with a one-quarter inch square drive that's compatible with drive tools of the same size. - Sockets come in sizes that are measured in inches and fractions of an inch to fit fasteners with an SAE (inch) size head. Material / Alloy Steel Finish / Black Oxide Drive Size / 1/4 in Drive Type / Power Socket Depth / Standard Socket Length / 15/16 in Socket Shape / 6-Point Socket Size / 3/8 in Overall Length / 15/16 in Measurement Type / SAE Bolt Clearance / 15/64 in Number of Points / 6 Standards / ASME B107.110-2012