Ring terminals are tinned copper for maximum corrosion resistance and greatest electrical conductivity.
The grooved barrel grips the wire to provide superior holding power and current flow.
Premium nylon insulation wont split or crack like the PVC used on automotive connectors.
Nylon insulator resists water, oil, chemicals, acids and UV degradation.

Crimp ridge positions the crimping tool to prevent mis-crimps
Brass sleeve crimps on the wire insulation to provide fatigue and strain relief
Funnel entry guides wire into position and prevents strand turn back
Seamless barrel construction prevents barrel from splitting
UL Listed