Using the Bosch HC7505 rotary hammer core bits is easy. First, make sure your hammer drill has an SDS - Max chuck to fit the bits. Insert the bit firmly into the chuck. When you start drilling, apply steady pressure. The wave design and carbide - tipped features will help you drill faster and more efficiently. For best results, keep the drill perpendicular to the surface. As for maintenance, after each use, clean the bits with a brush to remove dust and debris. Check the carbide teeth regularly for any signs of wear. If the teeth are significantly worn, it might be time to replace the bit. Also, store the bits in a dry place to prevent rusting. Always follow the safety instructions in your hammer drill's manual when using these bits.
