The duo socket provides one socket for all applications
Built specifically to address the needs of the professional technician using hand tools, cordless impact tools and air tools
Size markings are hard stamped into the socket for easy identification
Black oxide coated for resistance against rust and corrosion
Made from high quality chrome-molybdenum steel
Impact Duo-Socket , 3/8-inch drive, 3-inch extension. The thin wall design of chrome hand sockets are combined with the strength and durability of Grey Pneumatic impact sockets to create the Duo-Socket.