Proto JFF120 Steel Oil Filter Wrench 3.125 to 4.75 in

Product Description

The PROTO JFF120 is a steel self-gripping oil filter wrench designed for removing and installing spin-on oil filters in a wide range of diameters. The wrench accommodates filter sizes from 3.125 inches to 4.75 inches (80mm to 120mm), making it suitable across a broad selection of filter housings found in light-duty vehicles, small engines, and equipment serviced in trade and fleet environments. Its self-gripping mechanism increases clamping force as torque is applied, eliminating the need for a separate strap or band tool in most service scenarios. Built from steel, it is suited for professional shop use.

This tool is used primarily in automotive, fleet, and equipment service settings where oil filter changes are a routine maintenance task. The self-gripping design provides reliable engagement on smooth or dirty filter housings without requiring additional accessories. It is appropriate for use by automotive technicians, fleet mechanics, and maintenance professionals who encounter a range of filter sizes across different equipment types.

Key Features

• Self-gripping design increases clamping force with applied torque for secure filter engagement
• Fits oil filter diameters from 3.125 inches to 4.75 inches (80mm to 120mm)
• Steel construction for durability in professional shop environments
• Single-piece tool requiring no additional components for operation
• Compact profile fits within typical engine bay clearances

Compatibility

Designed for use with spin-on oil filters ranging from 3.125 inches to 4.75 inches (80mm to 120mm) in outside diameter.

Installation Notes

This tool is used by automotive technicians and fleet mechanics during routine oil filter service. Before use, ensure the engine is off and cooled to a safe handling temperature, and drain the oil as required by the service procedure. Position the wrench around the filter housing and apply steady rotational force — the self-gripping mechanism will engage as torque increases. Follow equipment manufacturer service intervals and disposal guidelines for used oil and filters.