There is a big variety of different rotary tools available in market. They are not just from different brands but also has different features. Some of them are very light, some of them are very powerful etc. To choose the right one for you it is best to test them. It is possible in bigger stores or on different promotions. Or you can just ask your friend to show you his.
One of the world biggest rotary tool producers is Dremel, the company established in Wisconsin in 1932 by engineer Albert Dremel. The company is famous by their cordless rotary tools which are very light and has long autonomy.
The best thing about Dremel tool is its multifunctionality. It comes with more than 50 accessories which makes it possible to be used for drilling, cutting, polishing, shaping... It is even more usable because of its variable rotation speed.
