Punk 4mm HSS-co. Drill Bit (10 Pack)

PUNK High Speed Steel HSS-Co Drill Bits offer upto 40% faster drilling than standard PUNK drill bits. High quality HSS/cobalt alloy provides greater rigidity and hardness at higher temperatures Self-centring 135° split point tip reduces the need to pre-drill/centre punch holes Offers up to 40% faster drilling than standard PUNK drill bits Precision ground and anti-corrosion salt spray tested Suitable for use with harder materials such as stainless steel and cast iron