Description: _x000D_ A set screw is a type of screw generally used to secure an object within or against another object without using a nut. The most common examples are securing a pulley or gear to a shaft. Set screws are fully threaded and has no head projecting past the major diameter of the screw thread. These set screws are driven with an internal-wrenching hex socket drive. _x000D_ _x000D_ _x000D_ Features: _x000D_ These set screws are made from 12.9 grade alloy steel for high hardness, durability and long service life. _x000D_ They are multipurpose hex socket head set screws that you can simple drive with a hex key._x000D_ _x000D_ There are 10 common sizes and you can concentrate on your project without worrying about not having the correct screws._x000D_ _x000D_ Get these total 200 pieces screws so you won't be running off to the hardware store for a set screw for quite a while. _x000D_ Well packed and assorted in a transparent resealable box for convenient carry and storage._x000D_ _x000D_ _x000D_ _x000D_ Specifications: _x000D_ Material: 12.9 grade alloy steel _x000D_ Color: Black _x000D_ Type: Hex Socket cup point_x000D_ _x000D_ Size and Quantity: _x000D_ 20pcs M3x3mm _x000D_ 20pcs M3x4mm _x000D_ 20pcs M3x6mm _x000D_ 20pcs M4x4mm _x000D_ 20pcs M4x6mm _x000D_ 20pcs M5x5mm _x000D_ 20pcs M5x8mm _x000D_ 20pcs M6x6mm _x000D_ 20pcs M6x10mm _x000D_ 20pcs M8x8mm _x000D_ Box Size: 13 x 6.5 x 2.3cm / 5.11 x 2.56 x 0.9"_x000D_ _x000D_ _x000D_ _x000D_ Package Includes: _x000D_ 200pcs x Screws