Using your Klein Tools 3210 Spud Wrench is easy. First, identify the size of the bolt or nut you're working with. Since this wrench is designed for 1/2 - Inch bolts and U.S. heavy nuts, make sure it's a match. Slip the wrench onto the nut or bolt and apply pressure to turn it. The continuously tapered handle helps you line up the bolt holes easily. When using, don't apply more force than necessary as the tool is strong but over - stressing can cause damage. As for maintenance, keep it clean after each use. Wipe off any dirt or debris with a dry cloth. If it gets wet, dry it thoroughly to prevent rust. Store it in a dry place, and it'll serve you well for a long time.