Used to secure plasterboard to timber stud work. The collated strips are specifically designed to be compatible with all leading power tool brands. Please Note : Due to geographical locations we are unable to deliver to Highlands. Fire Classification: A1 Thread Dia. mm: 3.5 Length mm: 32 Thread Length mm: 27 Head Type: Bugle Recess Type: Phillips Point Type: 25 Sharp Driver Bit Size: PH2 Finish: Black Phosphate Material: Carbon Steel Max Drilling Thickness mm: N/ASize 3.5 x 32 - 1000 Pieces