Our OPEN-LOK™ Blade Adapter 5 Pack is for Dremel Multi-Tool Models MM45 and MM50. The MILWAUKEE® Multi-Tool Blade Adapter is only needed for use with the Dremel Brand multi-tool models MM45 and MM50. It is not required for any additional brands or models. The raised adapter shape design allows you to easily install and remove. Our Blade Adapter is designed and made in the USA.