Spiral Flush-Trim Router Bits，Solid Carbide Flush Trim Router Bit 1/4-Inch Shank Spiral Flush Trim Up Cut from TACKPRO (1/4 Shank Up-Cut)

This is a great bit. I got it to trim aluminum siding on a homemade teardrop trailer. It started out a breeze easily cutting through the aluminum... for about 3ft, then it started having all kinds of trouble. I about gave up on it but tried a few drops of cutting oil. Magic! For cutting aluminum use cutting oil often. Cuts like butter. I probably cut about 100linear feet so far. (I assume people who work with metal and routers already know this. I didn’t)

Cuts through wood like butter and is not that expensive.

I purchased 2 router bits of this item for cutting letters w/ soft aluminum sheet. But theyve been all gone (Broken) even though I put 1 level below from max. speed of the router DeWALT and cutting slower.

Perfect for what I needed. Cut was clean.

Works great

Bearings failed third time using it. Edit: Bit was replaced and no problems yet.

Spiral router bits make pattern routing easy and painless! These are good bits at a great price.

Nice bit

I needed a small diameter router bit for trimming 1/2 plywood. This product is fabulously sharp and very easy to use. Highly recommended!

Great router bit did everything I expected plus more