Using your DeWalt DCD1007B 20V MAX XR 1/2 Hammer Drill is easy. First, make sure you've inserted the DCBP520 20V Max 5Ah battery correctly. Then, choose the right bit for your job and secure it in the 1/2 in. ratcheting nitro - carburized metal chuck. You can select from three different speeds depending on the task at hand. When working in a dim area, use the adjustable 3 - position LED to light up your workspace. The ANTI - ROTATION System is there to protect you, so if the drill starts to rotate too much, it'll shut down automatically. Just look for the red LED to know when it's engaged. For maintenance, keep the drill clean after each use. Wipe off any dust or debris, especially around the chuck and the vents. Store the drill in a dry place. Also, charge the battery as recommended in the user manual to keep it in good condition. And always remember, this drill is powerful, so use it with care and follow all safety instructions.