Proto J07521MLT Impact Socket 3/4 Drive 21mm 12-point

Product Description

The PROTO J07521MLT is a 3/4 inch drive impact socket designed for high-torque fastener work in professional trade and industrial settings. Built from steel with a chrome finish, this 12-point socket measures 21mm in size and has an overall length of 3.125 inches. The 12-point design allows engagement from multiple positions, which is useful when working in tight or awkward access points. Licensed mechanics, fleet technicians, and industrial maintenance professionals rely on impact-rated sockets like this one to handle the rotational force generated by pneumatic and electric impact wrenches without cracking or deforming.

This socket is suited for automotive, heavy equipment, and industrial maintenance applications where a 3/4 inch drive impact wrench is the tool of choice. The 21mm size is commonly encountered on suspension components, wheel fasteners, drivetrain hardware, and structural bolted connections. The 3/4 inch drive platform is standard in medium-to-heavy-duty service environments, making this socket a practical addition to a professional drive set used in shops, field service trucks, and maintenance facilities.

Key Features

• 3/4 inch drive for use with medium-to-heavy-duty impact wrenches
• 21mm socket size covers common fastener dimensions in automotive and industrial work
• 12-point design provides multiple engagement positions in confined spaces
• Steel construction rated for impact use, resisting deformation under high-torque loads
• Chrome finish for corrosion resistance and easy identification
• Overall length of 3.125 inches suits standard-depth fastener access

Compatibility

Designed as an OEM-style impact socket for use with 3/4 inch drive impact wrenches and ratchets in professional automotive, fleet, and industrial maintenance applications.

Installation Notes

This socket is intended for use by qualified mechanics and maintenance technicians using 3/4 inch drive impact or hand-drive tools. Always confirm the socket is fully seated on the fastener and the drive tool before applying torque. Inspect the socket for cracks or deformation before each use, and remove it from service if damage is found. Do not use impact sockets with non-impact hand-drive tools that are not rated for the torque output being applied.