The MILWAUKEE® Backpack Harness Kit easily attaches to MX FUEL™ equipment, like the like the Portable Battery Extension (MXF010-0), Submersible Pump (MXF211-1XC), and High Cycle Vibrator (MXF372-2XC). The Backpack Harness gives you the ability to transport MX FUEL™ Equipment with ease and allows you to comfortably wear compatible solutions on your back for extended periods of time. Designed to be fully adjustable with extra padding in the shoulders and lower back, the waist and chest straps provide more comfort and less fatigue.