Hex Key Set - 9 Pc SAE

The "Hex Key Set - 9 Pc SAE" is a set of 9 hex keys in different sizes used for tightening or loosening screws or bolts with hexagonal sockets. The set is designed with SAE (Society of Automotive Engineers) measurements, which is a common unit of measurement for screws and bolts in North America. The hex keys are usually made of chrome vanadium steel, which is durable and corrosion-resistant.