Proto Flex Socket, 3/8 inch Drive Size, 11/16 inch Socket Size, 12-Point, Alloy Steel, Standard, Chrome Finish, SAE J5278A

Proto J5278A Flex Socket Features

• These 3/8-inch drive SAE sockets have a three-eighths inch square drive that's compatible with drive tools of the same size.
• Sockets come in sizes that are measured in inches and fractions of an inch to fit fasteners with an SAE (inch) size head.

Proto® Offers More Than Just Tools. What We Really Offer Our Customers Is: Peace Of Mind.

Proto Tools customers work tough industrial jobs in extreme environments and the impact of injury or work stoppage can be catastrophic and costly. That’s why they demand the most durable and safest tools in the world. When they buy from PROTO® they aren’t just buying tools. What they are really buying is the confidence that our tools will help keep them working longer and safer. To ensure this, the PROTO® brand must always be unique in the marketplace, relevant to our customer’s work styles, and authentic to our company’s values and heritage. Lastly, these objectives must be implemented in a consistent manner in order to build recognition and trust in the PROTO® brand.

Proto tools are industrial strength

Proto Tools help its customers to work in the toughest places in the world where nobody else wants to. 365 days a year, 24 hours a day, 7 days a week, proto tools keep industries working. proto tools are not weekend warriors. We don’t have the luxury of only working when the weather is sunny, and the beer is cold. We work in the deepest mines. We work in the hottest deserts. We work in the arctic tundra. We work in the dark. We work in the mud. We work on oil rigs, on factory floors, and in train yards.

We Are Safety Obsessed.

Safety is not an afterthought. It’s embedded in proto. It has to be because heavy industries are inherently dangerous environments where lives are at stake. We are exhaustive in our efforts to make the world’s safest tools and educate workers to work safely.

Proto Tool's heritage.

proto tools are highly experienced, and brands don’t get to be our age without doing a few things right. The combination wrench is our birthright. Proto tools helped build ‘34 Fords, The Golden Gate Bridge and Apollo 11. Over 100 years strong and still growing; No one makes tools better, more durable, or safer.