Clean and resize male/female, SAE J560, 7 round pin tractor-trailer connectors and thoroughly remove corrosion which when left alone can lead to poor electrical connections. This multi-patented tool also doubles as a pin/socket wear gauge and tests whether the connection needs to be resized or replaced.

Warning: This product may expose you to chemicals including lead which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov