Item Type: Expansion + enlargement screwMaterial: Carbon metallic galvanizedColor: silverSize: M4 M5 M6Features:1. Strengthen anchor wings may give maximum load carrying capacity, which is practical.2. Integral threaded adhesive washers can be used for elevated reliability, which is with excessive performance.3. Combination head on screw has the power to receive slot and cross-slot screwdriver.4. Entitled with pratical adoptability, its wonderful can keep its high functionality for a long time.5. Built to strict qc standards, design is progressed for more durability.Packaging quantity: 10/30/50pcs