Economical hardfacing tip. I used them to level 3 x 16 foot oak panels on my CNC machine. An old shop robot with a 3.25 HP Porter cable cutter. not exactly a high dollar setup, but it works. The bits kept clipping but started burning a little after 5 or 6 hours of use, but that was partly due to the slow 60 ipm I had to run to keep the router from stalling. Would I buy again, yes I have already bought 4