Using your Bosch HCST006 hammer bit set is easy. First, make sure you've got the right bit for the job from the set, which includes different sizes and a flat and point chisel. Insert the bit into your SDS-plus chuck on your rotary hammer. When you start drilling into concrete or other masonry, the centric tip will help you get a quick start. Just apply a bit of pressure and let the bit do its thing. The bits are designed to run cooler, so you can use them for longer periods without worry. Remember to always wear eye, ear, and dust protection while using the bits. This will keep you safe from any flying debris and the noise of the hammer. After you're done with your work, clean the bits with a brush to remove any dust or debris. Then, put them back in the Brute Tough™ storage case. This will help keep them organized and protected for your next project. If you notice the wear mark on the bit tip, it's time to replace the bit as it has worn beyond the ANSI specification.