I have a Black & Decker Dremel type tool and it's served me well over the years. It has variable speed control and it comes with a pen like attachment. It also uses Dremel bits but the main body can't use all of the same bit as the extension. Also, the extension tends to have less torque than the main tool so it will sort of jam up if the going, particularly when cutting, is a bit too hard or if you use too much pressure.