Package contents: 3 x 1 or 4" drive adapters, one 3 or 8" drive adapter, one 12.7mm drive adapter and each with a set of 1 or 4" hex socket wrench adapters . Transforms any electric drill into an electric nut driver. Heavy-duty spring-loaded ball bearing holds sockets securely in place. The sockets snap firmly and do not slip Multi-function: used in the installation of pneumatic screwdriver, electric screwdriver, pneumatic drill, manual screwdriver and other installations for the hex tool. It is a good accessory for conversion. Uses: Attach these versatile extension bars to any chuck or powered or cordless impact driver to turn it into a high-speed nut driver - Useful for automotive repairs, technicians, DIYers and hobbyists to use with sockets on hardware or tire nuts, lag bolts, hex head screws at home, workshop or construction site Durability: Quality is guaranteed with this sturdy and durable 3-piece solid steel set designed to withstand torque compression in most standard use situations. The weatherproof exterior coating provides additional protection against damage from elements and substances such as oil and liquids that may come into contact with the extension bars when using repairs such as in the automotive field . . (3 Hex Shank Impact Socket Adapters 1 or 4", 3 or 8", 1 or 2" Premium quality adapter or extension transforms power supply into high speed nut driver. 6.35mm, 9.5mm, Quantity: 3 pieces Color: as pictured