

Ships same day if ordered by 12 pm
Manufacturer pricing rules prevent us from advertising our discount — no account or email required to see it.
Secure Payments
Easy Returns
Expert Advice
Fast Shipping
The WILLIAMS COMFORT PRODUCTS TM-391 is a torque multiplier rated to 1200 foot-pounds of output torque. It is a mechanical hand tool designed to multiply input torque through a planetary gear reduction system, allowing a technician to achieve high torque output without impact tools or large breaker bars. The TM-391 weighs 13.148 pounds and is sold as an individual unit. It is used by trade professionals who need precise, controlled high-torque application in tight service environments.
The TM-391 is suited for commercial and industrial service applications where fasteners require torque levels beyond what standard hand tools can safely deliver. Typical install scenarios include large mechanical equipment assembly, heavy HVAC equipment mounting, and industrial piping or structural fastener work. Licensed tradespeople and millwrights working on heavy equipment use this tool where controlled torque is critical to joint integrity and equipment longevity.
Designed as an OEM-style torque multiplier for professional trade use in applications requiring controlled high-torque output on large fasteners and bolted assemblies.
This tool is intended for use by qualified tradespeople familiar with torque application procedures. Always confirm the drive size and reaction arm setup before applying load. Ensure the reaction arm is properly seated against a fixed surface to prevent rotation under load. Follow equipment manufacturer torque specifications and applicable mechanical codes when tightening critical fasteners.
Thanks for subscribing!
This email has been registered!