Using this all - terrain dolly is easy. First, attach the Powr - Grip Hand Cup to the item you want to move, like glass lites or patio doors. Then, place the item on the dolly. You can now roll it around the jobsite. The pneumatic tires are great for going over curbs, doorsills, and scrap lumber. When using it, be aware of the warning. This product may expose you to lead, which can cause health problems. Check www.P65Warnings.ca.gov for more details. For maintenance, keep the tires properly inflated and clean the Hand Cup regularly to ensure it works well. Store it in a dry place when not in use.