SpeTool Upcut Spiral Router Bits Extra Long (4 inch) with 1/2 Inch Shank , 1/2 Cutting Diameter Solid Carbide CNC Router Bits End Mill for Wood Mortises and Cutting Dadoes Carving

Very high quality was not disappointed. I use it for making maloof joints and making the first notch. Could not recommend it enough.

Cut maple end grain counter top like butter. Very little tear out, very sharp - only used it a few times but appears to stay very sharp with repeated use - time will tell. Based on price - I couldnt ask for more!

Got this bit for a project that I needed to do a lot of mortise and tenons. Stayed sharp the whole time and worked great. Didnt dull at all, so I am assuming the longevity is good as well

As described

Using this on my CNC lathe. Works great. So sharp you need to be careful just handling the bit. (Voice of experience.)

This is a very adequate bit. Sharp, cuts are clean. As advertised. I use this in a plunge router to cut mortises in hardwoods and the results are quite satisfactory. Why pay more?

Used it only once thus far. Cutting 2 cherry. Very sharp, low noise, low vibration. Good enough for me.

Excellent router bit

Absolutely loved this bit!

So far so good, had no problem to mortise through oak. Big question is how long will it stay sharp for? Good product for the buck.