I have an 4" angle grinder from harbor freight that has out lasted 2 maketas. I use it to cut stucco and concrete mostly and the one in the truck is 6+ yrs old. Other tools have not lasted one job. I get step drills when they are on sale and don't mind too much when they get dull, they work good for long enough. I just bought an 700 watt inverter so will see how long it lasts. Rod
