Proto 3/4" Drive Socket 55 MM - 12 Point J5555M-SBD

Proto's J5555M-SBD is a professional-grade 3/4-inch drive 55mm socket engineered for high-torque industrial and heavy-duty mechanical applications. This metric socket features a 12-point configuration, which provides twice the engagement positions of a standard 6-point socket, allowing for faster indexing and significantly better accessibility in tight quarters where handle swing is limited. It utilizes Proto's patented TorquePlus™ design, a high-performance drive configuration that allows the socket to grip the flats of the fastener rather than the corners. This radius-corner geometry minimizes rounding, protects expensive hardware, and provides the grip necessary to turn worn, rusted, or damaged fasteners. Forged from high-strength alloy steel, it is built to meet or exceed ASME B107.110-2012 and SAE AS955 standards.
Key Features
TorquePlus™ Drive System: Advanced internal geometry shifts contact stress away from fastener corners and onto the flats, reducing rounding and maximizing torque transfer.
High-Access 12-Point Profile: Offers double the indexing positions for faster alignment and better maneuverability in restricted work environments.
Industrial Alloy Steel: Forged and heat-treated for maximum strength and long-term durability under heavy-duty professional use.
Satin Finish: Typically features a satin finish to provide a professional look and a textured surface that is easier to grip in oily or greasy conditions.
Optimized for Maintenance: Specifically designed to effectively grip and turn fasteners that are already worn, rusted, or made from soft materials.
Standard Metric Dimensions: Features a 55mm opening size with an overall length of 2-7/8 inches, designed for heavy-duty 3/4-inch drive tools.
Product Weight: Weighs approximately 1.94 lbs, providing a robust and durable profile for high-torque industrial tasks.