Spiral Flute End Mill

The 12mm cutter length is great for thicker stock. Be sure to move these slowly, as that extra length makes them very fragile. Broke a couple before I backed-off enough the motion speed. Still a good value IF you need 12mm. If you're not cutting that deep get a shorter cutter that's less fragile.

I am using the bits on a cnc to cut parts that have several small holes. These cut with little resulting waste and are sized so I dont have tool changes. Lost two bits from being stupid, but no loss from cutting.

I have some incredibly expensive end mills that I typically use for hardwoods, I'm not a fan of dulling out those $30 / end mill tools on things like "hardboard" or MDF - hence the $2.60 option. These have lasted a couple jobs per end mill using really conservative feeds and speeds ( 30 IPM, .65 mm depth per pass) and I can't complain. Don't buy these expecting them to last as long as your "Spektra" coated tools - expect them to be in the VALUE of $6.00 / tool for $2.60 each.

These bits are simply amazing. I was able to cut out 12 of these lanterns before 1 broke. I've got my cnc set to cut at 0.30 depth per pass and cutting 60 inches a minute turning 18000 rpms on the spindle. Extremely durable and cheap.

Easy of use

Poor quality. Leaves a rough finish. Tried all five pieces to get a hot job done but they just couldn't perform. Switched to a better brand and got a perfect finish.

Fast cutting sharp good value

Have not used these yet but they do appear well made. And product was as described.