What knife should I use to cut the slingshot skin?

Slingshot flat rubber band is best to use a hob specially designed for marking rubber band. Afraid of untidy cutting or reducing the service life of rubber bands.

Hob is pressure cutting, mainly crushing, which is not easy to peel off, while art knife is friction cutting, which has friction resistance to materials. Soft-cut materials will stretch out and have burrs (such as soft rubber and toilet paper), so the cut rubber band is very poor. Cuts the flat skin, the hob is essential.