Designed after success of my Kobalt K24-MSL mount. Great for robots, power tool retrofits, portable lighting, e-bikes, remote 18V systems. 3D printed in Syracuse NY of PLA plastic. Accepts all Milwaukee brand M12 packs, and clones, 2Ah, 5Ah, 9Ah. Not fused, that is yours to do. Recommended 10 to 15 Amps.