1. who are we?We are based in Zhejiang, China, start from 2011. Our product exports and domestic sales each account for 50%. The main market for foreign trade is Southeast Asia.2. how can we guarantee quality?We have arranged professional quality inspectors in the workshop, and always a pre-production sample before mass production; always final Inspection before shipment.3.what can you buy from us?All kinds of self-drilling screws with all kinds of surface treatment4.why should you buy from us not from other suppliers?We have advanced production equipments, testing equipments, automatic screw nut threading equipments, automatic production line equipments for hardware surface plating and experienced core engineering team.5. Do you provide samples? ls it free or need extra fees ?A: Yes, we could offer free samples for the items in stock, just need to pay shipping cost. Mold fee is necessary for customized item. 6. Are you trading company or manufacturer ? A: We are manufacturer.