is used to cut disks, seals and rings up to a diameter of 19 mm, the knives can be easily screwed onto the mounting disk and can be combined with each other, case made of polypropylene, impact-resistant and chemical-resistant This set consists of: ? Knife: Ø 2- 3-5-7-9-11-13-15-17-19 mm mounting disc for knives Ø 2 to 20 mm and 18 to 34 "