The unit is in good condition and has been fully tested. The Dremel MM50 has a robust design that provides low vibration operation giving you better control for precise and clean cuts With a compact head that is 30% smaller than the Dremel MM45, The MM50 allows you to get into tight hard-to-reach spaces that others won’t fit Exclusive angled body design delivers a much improved experience, especially during flush cuts: you have better control and more room for your hands under the tool Powerful 5.0 AMP motor, highest in its class, delivers pro performance to get the toughest jobs done, such as cutting door jambs, trim, baseboards or any other restoration related project Tool-less blade change system allows you to change Accessories by simply twisting the knob,