This was used in auto mechanical applications. I would say this is the worst purchase I have ever made and it is grossly overpriced. He failed 95-98% of the applications. I tried to use it as I saw in the video. Amazing failure after failure. Waste of money and I'll lose $60 in insurance money. unfortunately. The 3/8 ratchet was expensive but best value for money. I contacted support but I wasn't satisfied with their response.