Williams Comfort Products JHWISFXTM612 Flextension 12MM

Product Description

The WILLIAMS COMFORT PRODUCTS JHWISFXTM612 is a Flextension drive extension combining a socket and extension into a single integrated unit. The socket is permanently fixed to the extension, eliminating the risk of separation during use. Built for 3/8 inch drive tools, it accepts 12 MM fasteners through a 6-point SUPERTORQUE lobular opening designed to maximize turning force while protecting fastener heads from deformation. The drive end includes a 7/32 inch cross hole bevel for easy handling, and the unit supports up to a 30-degree angle offset. Maximum working torque is 160 ft-lbs (1920 in-lbs / 217 Nm). Weight is 0.55 pounds.

Flextensions are used extensively in engine rebuilding, heavy equipment manufacturing, assembly lines, and equipment repair shops. The integrated design supports continuous, high-volume work where a socket dropping off an extension would cause delays or safety concerns. This unit is designed for use with hand tools and power tools operating in impulse or direct-drive mode. It is not rated for impact tool use. Licensed tradespeople and industrial assembly technicians working in automotive, diesel, and heavy equipment environments are the primary users.

Key Features

• Integrated non-removable socket and extension design prevents disconnection during use
• SUPERTORQUE 6-point lobular socket opening delivers higher turning power without rounding fasteners
• Socket retention pin is TIG welded, ensuring full rotational power transfer
• Supports up to 30-degree angle offset for access in tight or angled spaces
• 7/32 inch cross hole bevel on drive end for easier handling and positioning
• Durable black oxide finish for corrosion resistance
• Made in the U.S.A.

Compatibility

Designed for use with 3/8 inch drive hand tools and direct-drive or impulse power tools. Not compatible with impact tools. Other lengths and socket sizes are available by special order.

Installation Notes

Installation and use should be performed by qualified mechanics or industrial technicians familiar with drive tool systems. Always verify the drive size and socket size match the fastener application before applying torque. Do not exceed the rated maximum working torque of 160 ft-lbs. This tool is not rated for impact drivers or impact wrenches and must not be used with them.

Technical Specifications

• Drive Size: 3/8 inch
• Socket Size: 12 MM
• Point Count: 6-Point
• Maximum Working Torque: 160 ft-lbs / 1920 in-lbs / 217 Nm
• Angle Offset: Up to 30 degrees
• Cross Hole Bevel: 7/32 inch
• Finish: Black Oxide
• Weight: 0.55 pounds
• Country of Origin: U.S.A.

Standard Information

• Brand: WILLIAMS COMFORT PRODUCTS
• Manufacturer Part Number: JHWISFXTM612