Using these twin cylinders is easy. For vertical training, just grip the cylinders and do pull - ups or hang on them for suspension training. For horizontal training, you can use them in a way that suits your exercise routine. When using, make sure your hands are dry to get the best grip. Avoid using them with wet hands as it may reduce friction and cause accidents. After each use, wipe the cylinders with a dry cloth to keep them clean. Store them in a dry place to prevent the recycled rubber wood from getting damaged by moisture. With proper use and maintenance, these cylinders will serve you well for a long time in your climbing training journey.