Well-suited for all users, the Oregon Gatorline Round Trimmer Line features long-lasting, high-quality materials and fits most standard trimmer heads. This 0.08 in. dia. trimmer line is an ideal fit for many string trimmer models, including but not limited to: Stihl FS 45 and FS 40 C, DeWALT DCST920P1 and DCST970X1, Ryobi RY40220 and Greenworks 21362. Gatorline is compatible with most standard trimmer heads including fixed-line, semi and automatic bump-feed heads. Additionally, it fits most gas, electric, and battery-powered curved and straight shaft string trimmers. Check your string trimmer manual for recommendations and to ensure that larger lines will work with your trimmer.