Made out of zinc alloy, it offen to be put inside the MDF board, or other wooden plate, you usually use it with screws, widely used in wooden furniture industries steel one is also available, but a bit different in appereance, the cost is almost same with zinc alloy one these years.
1. Diameter: M4-0.7; M5-0.8; M6-1.0; M8-1.25; M10-1.5.
2. Length: please inquire
3. Material: zinc alloy.
4. Coating: upon request.