1/2" drive 10" (250mm) impact extension bar ANSI standard design for use with power tools with a ball bearing socket retainer Chrome molybdenum for use with power tools Ring and pin fixing hole on the female end to secure the adaptor to the air gun Ball bearing socket retainer on the male end to securely grip the impact socket Black phosphate finish for easy identification as an impact socket accessory Supplied with a metal socket clip for use with a socket rail