Using the Makita XT297T combo kit is a breeze. For the hammer drill, just insert the appropriate bit into the all - metal ½” self - ratcheting chuck. Select the right speed (0 - 550 or 0 - 2,100 RPM) depending on your task. When drilling into masonry, the high BPM will help you get the job done faster. The LED lights will illuminate your work area. For the impact driver, choose one of the 4 - speed power selections according to the fastening job. Use the Assist Mode to avoid screw problems and the Tightening Modes for working with self - drilling screws. The circular saw can be used for cutting various materials. When using the tools, always wear appropriate safety gear like goggles and gloves. Don't overload the tools. For battery care, charge them using the included charger. Don't over - discharge or over - heat the batteries. After use, clean the tools to remove dust and debris. Keep the tools in the provided tool bag when not in use to protect them from damage.