Proto J7218MHF Impact Socket 3/8 in Drive 18mm 6-pt

Product Description

The PROTO J7218MHF is a 6-point impact socket designed for 3/8 inch drive impact wrenches and ratchets. Built from alloy steel, it accepts an 18mm hex fastener and features a magnetic design that holds fasteners during placement and removal. At 1-1/4 inches overall length, it is a compact, heavy-duty socket suited for automotive, mechanical, and industrial fastener work. The 6-point contact geometry reduces rounding on hex fastener heads under high-torque impact use. This socket is a standard tool for mechanics, millwrights, and service technicians working with impact-rated drive tools.

The J7218MHF is used in applications requiring a 3/8 inch drive impact-rated socket on 18mm hex fasteners. Typical install scenarios include automotive drivetrain work, equipment assembly, and industrial maintenance where impact tools are the standard method. The magnetic retention feature aids single-handed fastener placement in confined spaces. This socket is appropriate for both shop and field use where a compact, impact-rated 18mm socket is required.

Key Features

• 3/8 inch drive compatible with standard impact wrenches and ratchets
• 18mm 6-point hex socket geometry minimizes fastener rounding under impact torque
• Magnetic design retains fasteners during positioning
• Alloy steel construction rated for impact use
• Compact 1-1/4 inch overall length for use in tighter clearances
• Lifetime warranty from PROTO

Compatibility

Designed as an OEM-style impact socket for use with 3/8 inch drive impact wrenches, air ratchets, and hand ratchets requiring an 18mm 6-point hex socket.

Installation Notes

Install and remove using a 3/8 inch drive impact wrench or ratchet. Verify the socket is fully seated on the drive anvil before applying torque. Inspect the socket for cracks or deformation before each use and remove from service if damage is found. Do not use impact sockets as substitutes for hand-tool sockets on torque wrenches.