Timco Box of 100 x WingTip Screw SDRILL No3 BIMET – 5.5 x 85 – BMLW85

Specifically designed to attach wood to light section steel (Max. 5mm). Coarse self-tapping thread with wings designed to ream out the timber> so the screw can achieve Max. R.P.M. without burning out. When the wings hit the metal they will break off to permit the thread to self-tap into the metal. NOTE: Partially threaded. 100 Pieces