I used it for cleaning clogged fins. I think that it is unavoidable in terms of structure, but the direction of the wire changed during use, it became disjointed and it became disjointed, and working efficiency was bad because it aligned with pliers every time. Other than that it did not matter.
I bought it to remove the dust jammed in the household air conditioner. Aluminum cleaner was not in time and was used in general detergent, but clogging of dust etc can be cleaned cleanly. However, it is made of wire with a thickness of about 0.8 mm when measured with calipers, so it is harder than I thought. I think that the hardness of this degree is necessary if it is correction of the fin bend etc. However, I think that it is somewhat hard even if it is the most loose to use for cleaning. In the item explanation of these fin cleaners, it will be appreciated if it displays such as hardness, thickness, etc. that makes you understand the difference of the products.