Quickly diagnose, repair and restore Truck and trailer harness connections. Includes 7 spade Pin Tester, Pin Cleaner/Resizer and chemical contact enhancer. A preventative Maintenance tool for cars, light/heavy duty trucks and trailers. First time Tool!. Resealable package The IPA8028 is a small conveniently sized, resealable clamshell holding 3 existing items, the IPA 7893, 8023 and 8030. The IPA8028 is the perfect solution for maintaining and repair both 7 spade pin trailer connectors. The tester can be used to verify continuity and wiring configuration. The cleaner is designed to precisely remove pin corrosion and resize the pin to its factory specs. The DeoxIT is a patented solution for breaking the bonds of microscopic corrosion and improving pin mating surfaces. This package can be hung from a peg board or kept inside a glovebox.