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

Great stuff. Gets the job done for sure.

I purchased cutter to machine mortises, really pleased with finish.

We used this bit in a circle jig to cut 2 thick pieces of poplar. Worked very well and is still sharp after 12 hours of use.

These router bits are not square. In other words, the top is not perpendicular to the sides so if they are used for something like a dado or finger joint you will not get a square cut. I have tried several and they were all the same.

I like it

This bit cuts so clean I am very impressed.

Initially it was great but if felt like it got dull pretty quickly. Overall it’s still pretty sharp, but the tip is what’s used the most is dull. If they can add some kind of coating just on the tip it will greatly benefit its life. But I also have a WhiteSide brand tool and I feel like it lasts longer.

Used it for cutting mortis joints, it worked as planned.

I was very impressed with the quality of the cuts and the outstanding fit of the parts. Im making 6x6 pergola posts using 2x6 #2 lumber. By machining one surface flat on the planer and then laying the flat side down on the CNC table, I get perfect dadoes and rabbets which perfectly interlock.

Worked great. Used it to cut sink opening in butcher block counter.