I am on my first body work project, doing the floor pans in my Challenger. I used the cheap $1.99 spot weld cutters for Harbor Freight. I bought several of them not knowing how long they would last, I got the whole pan out only using one. But I have no other practical experience to compare to others. I just chucked it in the dewalt drill and had at it. Seemed to work fine, but I am no expert.