Features and Benefits:Tools are designed to fit Deutsch HD10, HD20 and HD30 Series connectors plus Deutsch Jiffy Splices.Kit contains six tools to fit the following wire sizes: 4, 8, 12, 14, 16 and 20 gauge.Deutsch wire terminals have a special security collar that the connector tabs lock against. Tools are designed to slide over the wire in the rear of the connector to release the locking tabs.Deutsch terminals and connectors are found on Chrysler, GM, AGCO, John Deere, Case, Bobcat Caterpillar, Harley Davidson, Mercury outboards, Kenworth, Peterbuilt, White and other HD applications.Deutsch connectors are marked by name for each identification.