Yonico T Slot Router Bit Set 1/4 Inch Shank, 3 Pieces

I was a bit skeptical about how useful these might be, but my skepticism was unfounded. I've used them to cut several t-track slots for the various jigs that I use in my workshop. I've only used the medium one (great for use with 1/4-20 hex head bolts, and the large one, which cuts t-track slots. Medium plus 1/4" inch bit, or large and 5/16" straight cut bit, both cut to a depth of 7/16" makes perfect slots. Although they say that you don't have to use a straight cut bit first, I would recommend it. It's just a lot easier and cleaner to get a nice cut. I've only had these for a very short while, so I don't know about their longevity, but for the price, that's the least of my worries.