Specification:Model No: IWD-12For use with 12 gage(Contact Size 12) close barrel terminals.Crimp Deutsch closed barrel terminals found on motorcycles, trucks, contruction equipment, race cars, agricultural equipment, heavy duty vehicles and other vehicles and equipment subject to excessive vibration.smooth ratcheting mechanism.Model No: IWD-16For use with 14, 16 & 18 gage(Contact Size 16) close barrel terminals.Crimp Deutsch closed barrel terminals found on motorcycles, trucks, contruction equipment, race cars, agricultural equipment, heavy duty vehicles and other vehicles and equipment subject to excessive vibration.smooth ratcheting mechanism.Model No: IWD-20For use with 20 & 22 gage(Contact Size 20) close barrel terminals.Crimp Deutsch closed barrel terminals found on motorcycles, trucks, contruction equipment, race cars, agricultural equipment, heavy duty vehicles and other vehicles and equipment subject to excessive vibration.smooth ratcheting mechanism.Package includes:1pc of Wire Crimping Pliers Crimper Set