This is an original Milwaukee Part # 14-29-2606 Gear Box Assembly with a 1/2" chuck, suitable for use with the 2606-20 model. This The brand of this gearbox is Milwaukee, a reliable and trusted name in the power tools industry. The gearbox is designed to be used with other power tools and is ideal for those who are into DIY projects or those who work in the workshop. This item is categorized under other power tools, power tools, tools & workshop equipment, and home & garden.