Not as strong as the original. I was surprised to see that the rubber on the rubber brush roller slides from end to end during use after only 1 use. This is easily fixed with a drop of superglue at each end. Before sticking, make sure it is in the right position. I let it dry for 24 hours before testing. After about 20 uses, the three-winged lever broke off at the base (I still have no idea where it is lol). The trimmer's clamping screw is short and of very poor quality, discard it before cross-threading or stripping lines on the unit itself. The filters appear to be almost the same as the originals, as does the swivel wheel and swivel. Overall, the money saved compared to the quality of the product is yet to be determined.