Self-drilling point to aid fixing plasterboard to wall/ceiling track systems with a max. of 2.0mm thickness. The collated strips are specifically designed to be compatible with all leading power tool brands Fire Classification: A1" Thread Dia. mm: 3.5 Length mm: 40 Thread Length mm: 35 Head Type: Bugle Recess Type: Phillips Point Type: Self-Drilling Driver Bit Size: PH2 Finish: Zinc Material: Carbon Steel Max Drilling Thickness mm: 2.0 Timco Collated Drywall Metal Stud Plasterboard Screws - PH Bugle Fine Thread in Silver