Using the Milwaukee 2492 - 23 Combo Kit is a breeze. For the ratchet, simply insert the appropriate bit into the 1/4 - inch drive. Then, turn it on and start tightening or loosening bolts. The screwdriver works similarly - insert the bit into the 1/4 - inch hex chuck and start your screwdriving tasks. The LED work light can be used to illuminate your work area in dark spaces. When using the tools, make sure to wear appropriate safety gear like safety glasses. Don't use the tools in wet or damp conditions. For maintenance, after each use, wipe down the tools with a clean, dry cloth. Keep the batteries charged when not in use. If you notice any damage to the tools or batteries, stop using them immediately and contact Milwaukee's customer service.