I bought this because I have other letheli u20 products. The chain sunk into the bar on the end and locked up. I've started trying for replacement parts.,on Walmart instead of a return. The only option I see is a refund,which means I can't replace the saw,because it is double the price now in a very short time. So unless something miraculous happens I'm stuck with paying for a broke saw so I can use the battery with other tools. letheli please send a replacement bar to me ,so I can feel confident buying more u20 products in the future,before time to return this hardly used saw expires.Ill gladly write another review if you choose to replace saw or the bar that I need. If not I should've rated even lower,because I would not have a working saw after. a few minutes of ise