Massive professional guide bar for high-powered machines. Very high cutting yield. Massive and particularly rigid bar body. Fully replaceable bar head. Like all STIHL bars, this version is also made of high-quality chrome-molybdenum steel. Main uses: felling and cutting in forestry work. Also for hardwood and large diameter logs. Models: MS 440, MS 441, MS 460, MS 461, MS 650, MS 660, MS 661