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 1These set screws are made from 12.9 grade alloy steel for high hardness, durability and long service life 2They are multipurpose hex socket head set screws that you can simple drive with a hex key 3There are 10 common sizes and you can concentrate on your project without worrying about not having the correct screws 4Get these total 200 pieces screws so you won't be running off to the hardware store for a set screw for quite a while 5Well packed and assorted in a transparent resealable box for convenient carry and storage