These materials not only provide corrosion resistance but also ensure the tool's longevity. ????【RICH MATCHING ADAPTERS】Socket extension allows you to switch between 4 adapters to fit your socket or impact wrench (not included); Extension wrench tool includes 3/8in to 1/4in square drive adapter, 3/8in to 3/8in square drive adapter, 3/8in to 1/2in square drive adapter,1/4in Drill Drive Adapter 1.