Williams Comfort Products JHWBWM-1821 Box End Wrench 12-point

Product Description

The WILLIAMS COMFORT PRODUCTS JHWBWM-1821 is a double-ended 12-point box end wrench with an 18 mm and 21 mm opening, built for fastener work in professional trade environments. The wrench features a SUPERTORQUE box opening design that applies wrenching force to the flat surfaces of hex fasteners rather than the corners, reducing the risk of rounding or deforming fastener points under high torque. A 10-degree offset on the box end provides additional clearance in confined or restricted spaces. Weighing 0.63 pounds and measuring 11.5 inches in length, this wrench is sized for practical use across HVAC, plumbing, and mechanical service applications.

This wrench is suited for professional technicians working on residential and commercial equipment where metric fasteners are common. The 18 mm and 21 mm openings cover a range of fastener sizes frequently encountered in mechanical and HVAC service work. The offset box end is especially useful when working around obstructions or inside equipment panels where straight access is limited. Size markings on both handle ends allow for quick identification without needing to measure. Each unit is sold individually.

Key Features

• SUPERTORQUE box opening contacts flat fastener surfaces, not corners, for higher torque application without deforming hex points
• 10-degree offset box end provides clearance in tight or confined work areas
• Dual opening: 18 mm and 21 mm metric sizes in one tool
• 12-point design for multiple engagement positions per fastener rotation
• Size markings on handle ends for fast identification
• Meets ANSI B107.9M federal specification

Compatibility

Designed as a general-purpose metric box end wrench suitable for use on hex fasteners in HVAC, plumbing, electrical, and mechanical service applications where 18 mm or 21 mm metric fasteners are present.

Installation Notes

This wrench is intended for use by licensed tradespeople and qualified mechanics familiar with proper hand tool technique. Always ensure the wrench opening is fully seated on the fastener before applying torque. Power down or de-energize any associated equipment before servicing fasteners on electrical or mechanical systems. Inspect the wrench for cracks or deformation before each use and remove from service if damage is found.

Technical Specifications

• Opening Size: 18 mm x 21 mm
• Point Count: 12-point
• Box End Offset: 10 degrees
• Length: 11.5 inches
• Width: 1 inch
• Weight: 0.63 pounds
• Standard: ANSI B107.9M
• Sold As: Each

Standard Information

• Brand: WILLIAMS COMFORT PRODUCTS
• Manufacturer Part Number: JHWBWM-1821