The STIHL FixCut 31-2 cutting head is a one-piece magnesium alloy attachment that resists wear better than plastic heads in abrasive soil conditions, such as sandy or volcanic soils, with no moving parts to lose. This easy loading, lightweight cutting head is ideal for users that prefer manual heads requiring precut lengths of nylon line. Designed with grooves in the sides to reduce trimmer line shearing when contacting solid objects, the FixCut 31-2 cuts closer to the ground than most other nylon line cutting heads. Compatible with all straight shaft trimmers, from the FS 55 through the FS 131 (except for the lightweight RX models), this magnesium alloy cutting head also works on the FS-KM trimmer attachment in conjunction with any of the current KombiMotor models.