.300 Head Drive pin with Square WasherUsing high quality raw materials, each one after strict screening, easy to withstand 500Kg, military products, quality assurance, integrated molding, beautiful and practical, more penetration, longer life, corrosion resistance.Better after-sales service, Low Velocity Powder Actuated Pins are widely used and tooling ceiling, garage pipe installation, workshop ceiling, office area ceiling, air conditioning installation, fire pipe, bridge installation, exhaust pipe installation,