Timco Box of 200 x WingTip Screw S/DRILL No3 Zinc – 5.5 x 50 – LW50B

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. 200 Pieces