Feature: 1. Made of high quality zinc alloy, with good room temperature mechanical properties and wear resistance, can keep thread integrity after multi times use. 2. Usage: Pre-drill a proper hole, screw in with internal hex tool. Unique self-tapping designed external thread, contribute to tapping, with good tensile resistance, can effectively prevent stripped due to torsion or vibration. 3. Applications: Suitable for pine, plywood, fiberboard, etc, have a good effect in the advanced furniture combination.