OEMTOOLS 27211 Relay Circuit Tester Kit Includes: Tester, 5 Popular Relay Leads and 1 Universal Relay Lead Comes in a Sturdy Blow Mold Case Identify at the Push of a Button if a Wire, a Part, or a Relay is Defective Video: http://www.youtube.com/watch?v=lIgqEMtnHIA Identify at the Push of a Button if a Wire, a Part, or a Relay is Defective