For greater maneuverability when felling large trees, turn to the impressive performance of the MS 661 R C-M. Its wrap-around handle also provides greater operator comfort when cutting. Just like the MS 661 C-M, the saw includes STIHL M-Tronic™ engine management technology and delivers less vibration and 20% greater fuel efficiency than the MS 660. Other features include long-life filter system using HD-2 filter elements to provide longer run times between maintenance, an ElastoStart™ handle and a high output adjustable oiler.