Not having used a dremel I can't really comment but I have heard that the cutting wheels wear out to fast to be cost effective. I myself have used a jigsaw with a metal cutting blade and a drill and it work pretty well. I have also heard good things about holesaws.
jigsaw, dremel, hole saw all work. I personally find hole saws the easiest to work with, but it requires a drill + cost of hole saws(14 for arbor, $10 for hole saw(or less if you buy online with coupons ).
Jigsaw's also work well, but make sure you get a good metal cutting blade.
He said $14 for the arbor... Thats the center-guide-bit used to mount the saw onto the drill.(these hole saws don't have a shaft built-in for mounting, thats why the arbor is required)
its too bad hydraulic knock out's cost sooo much more than hole saws.
DaveGod75,
Hole saw's vary in cost depending on size. I took advantage of online coupons to get mine. I got a good arbor (the thing ot attach your hole saw to your drill) at home depot for $14.
Mikewarrior2- He never said cheapest tool, he wanted the best. Hydrolic knockouts would really only be a smart buy if you plan on doing ALOT of holes, because of its short time it takes to cut one.
Hole saws work nice. Dremel's are bad for cutting large holes, good luck staying on the line. You can get manual knock-outs that use a wrench instead of hydraulics that work just fine on the thin metal used for cases.
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