Designed For: Fixing plasterboard to heavier gauge drywall track (up to 2.5mm) Head Style: Bugle Drive Bit: Phillips 2 Drill Point: Tek 2 Fastener material: AISI C1022 Coating: Electroplated zinc /Black Phospate Shank Material: Carbon steel Fire Tested: Yes, to EN1364-1 Effective thread length: Fully threaded