The toroflux is made of a single strand of thin metal. If it's bent or if one or more of the coils is pulled hard or roughly, it can deform and will not handle as designed. Please note we cannot replace torofluxes that have been misused or deformed for free. However our warranty applies and you can send back a kinked toroflux for a half-price replacement. Not suitable for children under 8 years.