Double End Bolt,Special 1.ISO,ANSI,CE,JIS,DIN,BS& ... :4.8 ,6.8,8.8,9.8... Double End Bolt,Special Head Bolt,Bolt Maker ,M6 Bolt Dimensions1.What ... drywall ,wood and so on.4. We have strict quality control from producing to delivery.Our company had strong technology support ... reach in customer's hands .5. Recently,several New quality control equipments had brought to Enhance the strength of the quality ...