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)

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.

Works great

Trimmed without splintering

Terrible product and broke the first time I used it. Reached out to the seller and the offered to replace it, then gave me the run around for a week and now they say that they can’t send me a new one. Stay away from this poor crappy product

I ordered this bit in hopes it would give me a nice clean cut with my router table. First one spun the bearing off within the first two minutes of use. I ordered a replacement and the second one snapped in half and flew across the shop after trimming about 4 of 1/4 acrylic sheet. Avoid this one

works great.. and very durable..

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)

I used this bit to trim 3/8 drywall around a door. It cut 4 ft of drywall then the bit broke in the center of the shaft. I didnt expect it to be ultra-durable, but this is terrible. Not worth the risk of the bit exploding during light use.

Broke the first time to use. Garbage bit

Didnt last. Used it twice and it was done.