"For use on 4, 5, 6, 7 spade and 7 round truck and trailer male and female terminals","Maintains continuity and helps prevent circuit failure","Includes: (1) 4/5 Pin Terminal Cleaner, (1) 6-Way Round Pin Terminal Cleaner, (2) 7-Way Flat/Spade Pin Terminal Cleaners, (2) 7-Way Round Pin Terminal Cleaners, SWAB-EEZ®, and (1) 2ml DeoxIT® Contact Cleaner","Cleans and resizes trailer pins","Removes corrosion and increases harness life","Comes in a premium-quality holster with magnetic clasp CONNECTOR CLEANER MASTER SET PM8044 | Matco Tools