We own a cleaning company in Chicago and we used microfiber string mop but each one cost $8 and they break easy. We found this one and decided to give it a try! So far we are so satisfied with it that we are buying more for our other staffs and switching them all!! Very strong handle! Some people here complaint that it doesnt lock well but is because it has 2 locks! I didnt check it well and they were having the same problem as the handle would go down while mopping until I realize that it had 2 ways to lock and you need to do both! Best mop ever!