these knives can be screwed on the holders JLBM50PA, JLBM60PA et JLBM100, the JLB- knives are made of high-strength treated steel, allow precise cutting of slices made of soft materials such as gasket paper, foam, cardboard, leather, felt, cork, rubber, plastic, fiber, etc., the knives can be used manually by hammering on the holder JLBM53PA, can also be installed on a manual press with a JLBM50PA, JLBM60PA or JLBM100 receiving disc, the holder JLBM53PA can also be placed directly under a manual press