uxcell 1/2-Inch Drive 8mm Triple Square Spline Bit Extra Long Socket, S2 Steel 1/2-inch drive, 8mm triple square spline size Bits made of premium S2 alloy steel for superior hardness and great rust resistant Chrome vanadium steel socket for high strength and superior torque Notched drive ends fit any 1/2-inch drive ratchet or extension, preventing them from falling off Wide application in DIY hand-making, automotive repairs, household maintenance, and most general repairs