Using the DeWalt DCH072G2 is easy. First, make sure you have a fully - charged battery (battery sold separately). Insert the drill bit into the keyless chuck. You can use it for various jobs like mounting struts, installing conduits, etc. When using it for concrete drilling, the high impact energy will speed up the process. Just hold the tool firmly and start drilling. Remember, to meet OSHA standards, use the DWH200D dust shroud and DWH161D1 dust extractor. As for maintenance, keep the tool clean after each use. Wipe off any dust or debris. If the motor seems to be running hot, let it cool down before using it again. Store the tool in a dry place to prevent any damage.