Derkia - Bolt FASTENER Industry All Solution Applied in railway bridges, metallurgy and petrochemicals, machinery and shipbuilding and aviation, etc. Derkia-Bolt exports the Hose Clamp series to markets in 100 countries. 20 Long Years Of Manufacturing Excellence With Quality At It's Best! Our Products We are the industry heads and produce the most reliable and trendy solution you are looking for. Established in 2004 with 20 years of work experience and a 5000 square meter production workshop. We have 5 production lines and 3 automated production lines. Fastener production can be ODM/OEM as your request. Exported to over 80 countries. Having a professional quality inspection system and team. The only place where you’ll get the perfect solution for all your industry needs. Our Contributions Industries Fasteners - We Serve!