Proto J3118M Open End Wrench 18 Mm Double End

Product Description

The PROTO J3118M is a double-ended open end wrench sized at 18 mm, built for professional use in mechanical, HVAC, plumbing, and industrial service applications. Forged from steel with a chrome-plated finish, this wrench features a 15-degree and 60-degree head angle on opposing ends, giving technicians two working positions from a single tool. The head width measures 1-13/64 inches, providing solid contact on fasteners. At 0.22 pounds, it is lightweight enough for extended overhead or confined-space work without sacrificing durability. The chrome finish resists corrosion and makes the tool easy to wipe clean in the field.

This wrench is suited for residential and commercial service work across multiple trades. HVAC technicians use double-ended open end wrenches for refrigerant line fittings, equipment mounting hardware, and service valve access. Plumbers reach for them on supply line connections and fixture nuts. The dual-angle head design is especially useful in tight spaces where a single approach angle would be blocked by surrounding structure or adjacent components.

Key Features

• 18 mm double-ended open head fits a single fastener size with two approach angles
• 15-degree and 60-degree head angles for access in restricted clearances
• Steel construction with chrome-plated finish for corrosion resistance
• Head width of 1-13/64 inches for full-contact fastener engagement
• Lightweight at 0.22 pounds, suitable for extended or overhead use
• Meets GGG-W-636E federal specification standard
• Backed by a lifetime warranty

Compatibility

Designed as a standard 18 mm open end wrench suitable for metric fasteners commonly found in HVAC equipment, plumbing fixtures, and general mechanical assemblies.

Installation Notes

Use by qualified service technicians in accordance with applicable trade standards. Ensure the correct wrench size is matched to the fastener before applying torque to prevent rounding. Inspect the chrome finish periodically for wear or chipping that could indicate the tool has been subjected to impact loads it is not rated for. Open end wrenches are not rated for use with extension bars or cheater pipes.