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)

Used this to trim some veneer on speaker cabinets. Half way through the second one, I noticed a line in the veneer. Turns out that the bearing was dragging. I could feel when I spun the bearing by hand that it was getting hung up. I can’t recommend this

I bought two bits as replacements and a couple minutes into using it the clamp above the bearings and one of the bearings flies off! I was lucky enough to find both pieces and it was easy enough to put back together (which is telling) only for it to happen two more times, resulting in loss off parts. So, basically I spent $21 for three minutes of work, plus associated anger and disappointment.

This bit works amazingly! First use was to cut some kayak hatch holes, this bit sliced through the plastic smoothly and had no chatter just a clean easy to guide cut. Ive also used it on some wood projects and it performs equally well leaving clean smooth cuts that need almost no sanding. Its also very sharp you can feel the cutting edge on the bit so be careful taking it out of the protective case. Im very happy with the performance so far and will be ordering more for my wodshop.

I broke the first bit that was sent to me, but its because I didnt understand exactly what part of the bit could actually cut. At the top of the bit (the end that connects to the router), its solid cylindrical metal until you get to the point where the spiral groove starts to be cut into the shaft. That area cannot cut through the wood. Its not until you get a little further toward the bearing end that you get to the actually cutting area of the bit. I didnt realize this and was trying to cut plywood partially with that non-cutting area. It took a lot of force and ultimately the bit broke. Now that I understand, my replacement bit is working great. Ive seen a couple people complain about breaking bits, and I have to wonder if they did the same thing I did. Prior to this bit, I was using a 1/2 straight bit. It did the job, but it was a lot more work pushing it through, and the resulting cut was kind of rough. Needed a good deal of sanding. With this spiral bit, the cut is smooth as glass.

This was my first spiral flush trim bit and am very impressed. It seems to cut so much faster and cleaner that the 2 flute bits I have been using for MDF guitar templates. For the price, its a no brainer buy.

I was excited to use this router bit. Unfortunately it broke after cutting about 10” of wood. I was cutting out a pattern in soft 1/2” plywood and the bearings flew off. This damaged my template and the piece I was cutting. Not sure what holds the bearings on but I found them on floor on a pile of sawdust. Very glad they didn’t fly off and hit me.

This bit works great! Ive used it several times in a few different routers without any issues. This cuts super clean and makes end-grain routing so much less scary.

Used it to cut plywood out in window opening made it 2 inches snapped but it was a quick 2 inches. Disappointed to say the least.

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

Got the bit to route off the bullnose off stairs for hardwood install instead of cutting. The bit proved useless in that as it could not handle the 1 oak boards and just would not cut it. If you planning on making thick templates or routing hardwood look for something else.