Milwaukee HSS-G Thunderweb Drill Bit design is characterised by a conical shaped web which gets thicker towards the back of the drill bit. Standard drill bits have a constant thickness throughout their length. Even at the narrowest point the Tunderweb core is thicker than that of a standard drill bit. Specifications • Cutting Width: 4.5mm • Length: 80mm • Pack Quantity: 1 Features and Benefits • Parabolic web cross section: Large web thickness and strength built in • Thunderweb flute form ejects hot chips rapidly • Dissipates heat better increasing life time • Precision starting, drill bit won't walk on material surface • Polished finish reduces friction and extends drill bit life • Impact resistant ABS case with added rubber corner protection • Accepts higher feed pressure and torque equalling less breakages