... carbon steel ,stainless steelfinish: zinc platedfeature: wafer phillips self drilling screwssize: #10standard:GB/ANSI/IFI/DIN/JISOur ... company is dedicated to production of series of self-drilling self-tapping screws ,self-tapping screws, drywall screws, chipboard screws, blind rivets ... rivets, multigrip rivets. It now owns cold header, self-drilling machine, thread rolling machine, mesh-belt type ...