SK Tools - Set Universal/adapter 9 Pc - 40109 Piece Universal Adapters Set Adapters extends the performance capabilities of your SK tool set Universal joint allows access to hard to reach fasteners and drive at an offset angle Specifically designed for use with air or cordless impact tools Coated with Black Phosphate a rust preventative compound that makes them resistant to corrosion Extension with ball type retainer Set includes: 1 4" Drive Chrome Universal 3 8" Drive Chrome Universal 3 8"