Using this Klein zipper pouch is a breeze. First, unzip the pouch. Place your Tone - PRO (VDV500 - 063) and Probe - PRO (VDV500 - 123) in the respective compartments separated by the padded divider. Make sure they fit snugly. Then zip up the pouch to keep your tools secure. When it comes to maintenance, simply wipe the nylon exterior with a damp cloth to remove any dirt or debris. Avoid using harsh chemicals as they may damage the material. Also, don't overstuff the pouch as it may stretch the zipper or damage the padding. Store it in a dry place when not in use to keep it in good condition.