Kaneshin No. 18 are scissor style wire cutters. They are thin and narrow. They are perfect for removing the fine detail wire on your bonsai. They fit nicely in your hand and they allow you to get to the more dense parts of the branch. These are for the finest of fine wire. I would recommend only cutting #20, #22 copper and 1mm, 1.5mm aluminum.
For basic usage and tips on how to care for your bonsai tools please visit this link. Bonsai Tools & How to Care for Them