Milwaukee M18 battery mount. Magnetic, Pegboard, and Screw on. Pegboard version is designed to fit steel pegboards with standard 1/4" holes that are 1" on center. Color matched red to Milwaukee color.

M18: Magnetic
Brand: S&S Tool Co
Type: Battery Holder
Warranty: Unspecified Length
Color: Red
Manufacturer Part Number: M18B
Material: Plastic