Greenlee TK-30 Basic Electrical Kit To many electrical workers these three test instruments are a standard part of the tool bag. So why not put them together in one kit! These popular test instruments come with a durable carrying case that makes storage a breeze and provides added protection for the test instruments. As with all Greenlee test instruments, the three testers included in the TK-30 Basic Electrical Kit meet the latest safety standards. The TK-30 Basic Electrical Kit is sure to make the electrical workers experience faster, safer and easier.