Using the Bosch RH328VCQ is straightforward. First, make sure to attach the auxiliary handle for better control. You can adjust it to a 360 - degree position according to your needs. Use the multi - function selector to choose the right mode for your task, whether it's drilling or chiseling. The variable - speed 3 - finger trigger allows you to control the speed precisely. When using it, wear appropriate safety gear like goggles and gloves. Keep the tool away from water and moisture. After use, clean the tool with a dry cloth. Check the clutch regularly to ensure it's working properly. Store the tool in the provided carrying case to protect it from damage.