Item Type: Expansion + enlargement screwMaterial: Carbon steel Color: silver and BlackSize: M4 M5 M6Features:1. Strengthen anchor wings may give most load carrying capacity, which is practical.2. Integral threaded adhesive washers can be utilized for elevated reliability, which is with excessive performance.3. Combination head on screw has the ability to get hold of slot and cross-slot screwdriver.4. Entitled with pratical adoptability, its fine can hold its high performance for a protracted time.Packaging quantity: 21/40pcsSize:0.4cmx1.6cm/0.15inchx0.79inch0.4cmx2cm/0.15inchx0.98inch0.5cmx1.8cm/0.19inchx0.98inch0.6cmx2cm/0.23inchx0.98inch