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

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.

Excellent router bit

Very sharp. Just what I wanted.

Absolutely loved this bit!

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.

Works great

This three flute spiral bit cuts far smoother that the single flute bit I was first using to edge a workpiece. Expensive, but worth cent!

I like it

This bit is great! Made a sign out of 1.5 inch plywood 24x96 cut like a beast! Cut through a screw and it didn’t hurt it at all. This thing is a beast! Looking forward using this to make cabinets on the Cnc! I will buy this again.

The bit is quite the beast. I am just a hobby woodworker and admittedly the bit is handling all that I throw at it. It may not hold up to extended mass production use. But for the purposes of routing out mortises, tenons and rabbets, it does a really good job!