Using the Bosch ITPH2115 bits is easy. First, choose the right bit for your job. Simply insert the bit into your impact driver. Make sure it fits securely. When using, apply steady pressure and let the impact driver do the work. This will help prevent cam out and make your job quicker. As for maintenance, after each use, wipe the bits clean with a dry cloth. Store them in a dry place to prevent rusting. Avoid using the bits on materials that are too hard for them, as this can damage the tips. If you notice any signs of wear, it might be time to replace the bit for the best performance.