Made out of steel, sometimes shows up in a set with a screw, widely used in furniture and other industries. It's provided in different type of head and drive main function is to combine few components together.
1. Diameter: M4-0.7; M5-0.8; M6-1.0; M8-1.25; M10-1.5.
2. Length: standard size; there is not many choice for each diameter.
3. Material: zinc alloy.
4. Coating: upon request.