The Oregon® TerraMax™ Trimmer Line is ideal for cutting vegetation in harsh, dry, or rocky terrain. Made with a high-grade copolymer blend for added strength and durability,TerraMax™ line resists abrasion and fray, absorbs shocks,and reduces line breakage. Designed with an extended-pitch and helical shape, it delivers outstanding stability formaximum efficiency and faster cutting and also performswell at high temperatures – resisting welding and gluing inhead spools. Fits most standard trimmer heads and workswith most gas, electric, and battery-powered curved andstraight shaft trimmers.