Yep, I buy the 5 packs - seem to go through tonnes of them - never broken one, they just evaporate into thin air around my place... [biggrin]
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For the smaller sizes we generally use Suttons,packs of 10 or 20.Mainly 1/8,5/32,3/16,1/4",some double ended.
Larger just buy whatever brand, huge price differences though.
I dont know if the more expensive brand actually stays sharp longer?
What does make them last a lot longer,when drilling steel,or stainless steel is cutting compound.
I bought a 400mm 1/2" the other day,one brand was half the price of the other.
I grabbed the cheaper one as no doubt it will vanish before it gets worn out....
We generally get them at either either Trade Tools,Tool city,or Bunnings.
Check out the Project Farm on youtube.
Which Impact Driver Bit is Best? Let's find out! Phillips #2 Showdown - YouTube
I've been buying the Irwin driver bits for a while now - usually because they are right next to the checkout at the tools section of the local green shed.
But I've recently found these in the better quality tool store in town. Don't know if they are any better or not - time will tell. In general, Milwaukee tools are a step above most of what you can find at the green shed I've found.
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