They get my lawn mower working, downgraded to 2 stars a year in advance (edit 2 months later), the first pair lasted about 30 hours and they broke. This is a ride on mower that I can raise myself at the front so it's not an overload situation, lack of factory lubrication or contamination I guess. I'm lucky to have 6 more to go, mowing season is only half over.
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