Proto J5440B 1-1/4 in 12-point Hand Socket 1/2 in Drive

Product Description

The PROTO J5440B is a 1-1/4 inch, 12-point hand socket designed for professional use in mechanical, industrial, and maintenance applications. Built from alloy steel with a black oxide finish, this standard-length socket delivers the durability and corrosion resistance that trade professionals require. The 12-point geometry provides six additional contact positions compared to a 6-point socket, allowing faster engagement in confined spaces. It is driven by a 1/2 inch drive and meets ASME B107.1 standards for hand socket tools. Weight is 0.51 pounds.

This socket is suited for heavy-duty fastening tasks encountered in mechanical contracting, industrial maintenance, fleet service, and general construction. The 1-1/4 inch drive size makes it appropriate for large structural fasteners, heavy equipment, and commercial plumbing or HVAC applications where a 1/2 inch drive torque wrench or ratchet is the standard tool. The standard length profile fits most open access fastener locations without requiring an extension.

Key Features

• 1-1/4 inch socket size for large fastener applications
• 12-point design for quick engagement and multiple drive positions
• 1/2 inch drive compatibility with standard ratchets and torque wrenches
• Alloy steel construction for high-strength, heavy-duty use
• Black oxide finish for corrosion resistance and reduced glare
• Meets ASME B107.1 hand socket standards
• Backed by a limited lifetime warranty

Compatibility

Designed as a standard OEM-style replacement or addition for professional 1/2 inch drive hand socket sets requiring a 1-1/4 inch, 12-point socket.

Installation Notes

Install and remove fasteners using a compatible 1/2 inch drive ratchet, breaker bar, or torque wrench. Ensure the fastener head is fully seated in the socket before applying torque to prevent rounding. Always de-energize, depressurize, or lock out equipment before working on mechanical connections. Inspect the socket for cracks or deformation before each use and replace if damaged.