Line cutter that can cut and collect the rooted line(Nylon line only).Blade can be replaced with a cartridge (1 replacement cartridge is included with the product)Dedicated cartridge.We adopt phosphorescent material that is easy to see even at night fishing and dusk and is easy to find even if dropped. It is more effective to irradiate UV light etc. Number of cartridges (pieces): 2 (1 included with main unit + 1 for replacement)