Various self tapping drilling screws Material:Carbon steel Head type: CSK H, PH, ... prices Many different kinds of screwsChipboard screwsDrywall screwsSelf tapping screwsSelf drilling screwsMachine screwsWood screws Material: carton steel or stainless steel ... type: Philips, Slot, Square, Combination, Y type, hex capFinish treatment: Zinc-plated, yellow zinc-plated, nickel plated, brass plated, black ...