Rino Tuff 70266 Pivotrim X4 Pivoting Trimmer Head for Curved and Straight Shaft Gas .095&rdquo; String Trimmers w/ 6 Included Pivoting Lines and Adaptor Kit FITS ALMOST ANY GAS TRIMMER: Use the included adaptor kit to select the proper nut that will keep this unit fastened to your straight or curved shaft trimmer PIVOTING ACTION: Mini pivoting heads on the main unit will spin to reduce shock absorbed from encountering concrete or fencing. This preserves the lifetime of your lines so you wont need to reload often SIMPLE LINE LOADING: To replace the .095 line, you only need to cut it down to size and slide through the loops. No more fiddling with frustrating spools that come undone in an instant INCREASED CUTTING AREA: This unit effectively turns four lines into eight, increasing the cutting area on your lawn. This means youll need less pass-throughs to get your grass to its perfect length INCLUDED CUTTING LINE: Fill up the tank, plug in the head, and attach the included lines. What you need to get to work out of the package is included in this kit