This ToolPRO Socket Extension is suited for a 3/8" drive ratchet or breaker bar. These extension bars are used to extend the reach of your socket wrench by your desired length. Easy to use, these steel bars are added between a ratchet and the socket bit. This extension measures 75mm and is covered in chrome plating for abrasion and rust resistance. These extensions are extremely useful when trying to reach a bolt housed in difficult to reach areas such as an engine bay. Many items can be unreachable by hand and may require a modification such as this. This item is different from and not to be confused with a breaker bar, which extends the length of the wrench's handle while this extension adds length to the socket bit.