Secturity Screws Size: Cusomized Material; Stainless Steel,Iron,Copper Standard; DIN,BS,JIS,ANSI,GB. OEM Security ScrewsSize; M12-M36 Or at your OptionsMaterial; Stainless Steel,Low Carbonic Steel, Iron,Copper,Aluminum or at your optionsStandard; DIN,BSW,JIS,ANSI,GB etc.Other: OEM and Non-standard Fasteners Orders are WelcomedAdvantages ; 1. Professional Service 2. Engery Saving and Enviromental ...