These secateurs are intended for right handed users, they can cut through branches 25mm thick. It is recommended to clean the Felco pruning shears after use. Especially if the shears are very dirty or can start to rust after exposure to moisture. Cleaning them after use and adding a drop of oil therefore won’t hurt. And by using oil the hinge will also remain flexible. A small sacrifice, especially when you take into account the pleasure you will experience when using these pruning shears.