Williams Comfort Products ISFXTM616 Flex Extension

Product Description

The WILLIAMS COMFORT PRODUCTS ISFXTM616 is a 16mm flexible extension designed for 3/8 inch drive ratchets and sockets. At 6 inches in length, it provides reach and angular flexibility in confined work areas where a rigid extension would bind or fail to align. Trade professionals use flex extensions when accessing fasteners in tight engine bays, HVAC equipment cabinets, and mechanical rooms where straight-line access is not available. The ISFXTM616 is sold individually and is suited for any technician carrying a standard 3/8 inch drive set.

This flex extension is appropriate for HVAC service technicians, plumbers, electricians, and general mechanical trades working in residential and light commercial environments. It addresses common access challenges encountered when servicing equipment with recessed fasteners or awkward mounting orientations. The 6 inch length provides enough reach for most in-cabinet or under-panel applications without excessive flex that would reduce torque transfer.

Key Features

• 16mm size compatible with 3/8 inch drive ratchets and sockets
• 6 inch length for extended reach in confined spaces
• Flexible design allows off-angle fastener access
• Sold individually — one piece per unit

Compatibility

Designed as an OEM-style replacement and standard accessory for 3/8 inch drive socket sets used across HVAC, plumbing, and electrical service applications.

Installation Notes

A licensed or qualified trade technician should select the appropriate drive torque and socket size before use. Ensure the drive connection is fully seated before applying load to avoid rounding fasteners. Do not use flex extensions as a substitute for a universal joint where high torque is required, as angular force can reduce effective torque transfer and risk fastener damage.

Technical Specifications

• Drive Size: 3/8 inch
• Length: 6 inches
• Size: 16mm
• Unit of Measure: Each
• Minimum Order Quantity: 1
• UPC: 662459335111

Standard Information

• Brand: WILLIAMS COMFORT PRODUCTS
• Manufacturer Part Number: ISFXTM616