Wrench Tips
Tip #21: Always Use Lube
by Dave Coleman
This seems simple, but so many people get it wrong. If you're drilling or cutting metal, you should ALWAYS use some kind of cutting fluid. This keeps the drill bit or saw blade sharp much longer, and it makes a better cut. In a pinch WD40 works ok, since it always seems to be around, but do yourself a favor and get some Tap Magic cutting oil. This stuff really does work noticeably better.
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