Proto J7212MHF Impact Socket 3/8 in Drive 12mm 6-pt

Product Description

The PROTO J7212MHF is a 12mm, 6-point impact socket designed for 3/8 inch drive impact tools. Built from alloy steel with a magnetic style design, it measures 1-5/32 inches overall length and weighs 0.09 pounds. The 6-point geometry maximizes contact with fastener flats, reducing the risk of rounding under high-torque impact conditions. The magnetic feature helps retain the socket on the drive and can assist with fastener positioning during installation or removal. This socket is suited for automotive, mechanical, HVAC equipment service, and general trade work where impact-rated tooling is required.

This socket fits standard 3/8 inch square drive impact wrenches and ratchets. It is appropriate for residential and commercial mechanical service applications where 12mm fasteners are common, including equipment panels, mounting hardware, and mechanical assemblies. The impact-rated alloy steel construction handles the shock loads generated by pneumatic and electric impact drivers. PROTO backs this socket with a lifetime warranty, making it a durable long-term addition to a trade tool kit.

Key Features

• 3/8 inch square drive fits standard impact wrenches and ratchets
• 12mm 6-point socket design maximizes torque transfer and reduces fastener damage
• Alloy steel construction rated for impact tool use
• Magnetic style aids fastener retention during use
• Compact 1-5/32 inch overall length suits tight-access applications
• Lifetime warranty from PROTO

Compatibility

Designed as an OEM-style replacement and standard fitment for 3/8 inch drive impact tools requiring a 12mm, 6-point hex socket.

Installation Notes

This socket is installed by a mechanic or trade technician using a 3/8 inch drive impact wrench, air ratchet, or hand ratchet. Ensure the square drive tang is fully seated in the socket before applying torque. Use only impact-rated sockets with impact tools — standard chrome sockets are not designed for the shock loads produced by impact drivers and may fracture. Inspect the socket for cracks or wear before each use.