TIMCO Self-Drilling Wing-Tip Steel to Timber Light Section A2 Stainless Steel Bi-Metal Screws - 5.5 x 65 SDS Plus Drill Bits The bi-metal blade is the

The bi-metal blade is the combination of both a high carbon steel (HCS) body and a high speed steel (HSS) cutting edge

Coated with a patented multi-layer corrosion resistant plating to withstand 1

Manufactured from a high grade M2 tool steel for drilling heavy gauge non-alloy materials

stone and masonry

For attaching friction stays to PVCu frames

TIMCO Self-Drilling Wing-Tip Steel to Timber Light Section A2 Stainless Steel Bi-Metal Screws - 5.5 x 65 SDS Plus Drill Bits The bi-metal blade is theSpecifically 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 per