Socket caps have a small cylindrical head with tall vertical sides. Allen (hex socket) drive is a six-sided recess for use with an allen wrench (hex key). Socket head screws are for precision work with close tolerances and applications needing a well tooled appearance._x000D__x000D_Features_x000D__x000D_- Color: Black._x000D_- Material: Caron steel._x000D_- Size: 0.5 x 0.5 x 2.2 cm._x000D_- Socket caps have a small cylindrical head with tall vertical sides. Allen (hex socket) drive is a six-sided recess for use with an allen wrench (hex key)._x000D_- Socket head screws are for precision work with close tolerances and applications needing a well tooled appearance._x000D_- Socket head screws supply greater tensile strength than equivalent hex head Caps screws, while requiring less surface area to counterbore._x000D_- Used widely in the home, office and factory appliance, communication equipments, ship assembly and other machinery industry._x000D_- Made of high grade material, durable in use.Packing list: 60 x cup head screw