WhitesideRouter Bits UD2102 Up/Down Cut Spiral Bit with Solid Carbide Compression and 1/4-Inch Cutting Diameter

Used to cut speaker driver holes in 7-ply cabinet-grade plywood. Using a circle jig, these cut super clean holes, with no burning or tear-out. I went a little fast at times, and the bit cut cleanly, and did not break. Worth the money.

Really sharp. Great for shaper origin.

Works great. Nice and clean up and down cuts. Happy with his purchase.

Zero tear out on hard maple and walnutWorked wonderfully. Much better then the shaper origin stock bitsI’m very please with the results today

I run these bits 8 hours a day and rotate between three of them and than clean them after and they hold up awesome! I use them on a cnc machine. If you keep them clean they stay super sharp. When these dull out I will order more!

Works fine

Great bit. Compression bits are the way to go if you really need to reduce or eliminate fraying and blowouts along the cut edges. I like Whiteside products anyway, but wasn't sure how this one would handle being subjected to plywood almost exclusively. It started out plenty sharp and made super clean cuts. It did finally wear down, but gave me a reasonable amount of use life. Fit my .25in router well. Plenty of shank for the chuck, while still having a long cutting surface. Helps reduce vibration and bit flexing. As with any bit, cut at the right depth and right speed and you'll prolong the lifespan even more. I'm buying another one, kinda says it all.

I spend a lot of time using router bits. Normally I go with the most cost effective (cheap) I can get at the local box store. These Whiteside bits are no joke and well worth the extra $. I’ve used it multiple time and it has yet to snap or dull.