The Orbitrim is the first stringless trimmer head of it's kind! It easily attaches to 99% of gas trimmers in seconds and eliminates the need for replacement strings and wires. Orbitrim will trim almost anything: hedges, bushes, edging and even mowing thick grass. Made of durable solid steel to last for years of use! Does not work with electric, walk behind, battery operated or clutchless trimmers.