Quick and easy installation, no tool required. Loads in seconds by inserting 4 folded standard .095 or .105 precut lines and with 8 cutting edges you have the 4 X 4 power to cut through thick weeds quickly and easily. Can be used on straight or curved shaft trimmers. Fits 99% of all gas trimmers: Ariens, Bolens, Echo, Green Machine, Hoffco, Homelite, Husqvarna, IDC, John Deere, Lawnboy, McCulloch, MTD, Poulan, Paramount, Redmax, Ryobi, Snapper, Solo, Stihl, Tanaka, Toro, Troy Bilt, and weedeater. Uses .105 precut replacement line model No. 16455 (SKU 700510).