Using your GearWrench 85599 wrench set is a breeze. First, pick the right size wrench for your nut or bolt from the set that includes sizes from 5/16 - inch to 3/4 - inch. Place the wrench on the fastener and start turning. Thanks to the ratcheting feature on both the box and open ends, you don't have to remove the wrench between turns, which saves you a lot of time. The arrows on the head show you the direction to turn. When using the ratcheting box end, remember that it only needs a 5 - degree movement to turn the fastener. As for maintenance, after each use, just wipe the wrenches with a clean cloth. The polished chrome finish makes it easy to clean off dirt and grime. Keep the wrenches dry to prevent rust. Store them in the included rack to keep them organized. Also, avoid using the wrenches on fasteners that are too large for their size to prevent damage to both the wrench and the fastener. With proper use and care, your GearWrench 85599 set will last you a long time, backed by its limited lifetime warranty.