I have had this die grinder for 6 months now. I have to say this is the best I've had in a long time. I'm a welder and I use it almost every day. I lubricate it with air tool oil and work on it pretty hard most of the time. It retains its power and does its job. The barrel can get quite warm after prolonged use, so gloves are strongly recommended. Also, there is a two-year warranty that you activate on their website. I would definitely recommend it to anyone who needs a reliable, heavy-dutyβ¦