QualityParts From Oregon That you can depend on. High cutting efficiency – Magnum Gatorline allows you to get cleaner, straighter cuts with less effort than traditional trimmer line: Durable – High-strength inner core resists breakage which means that the line lasts longer and you spend less time winding spools; Square trimmer line – Slices through vegetation with a clean, even pass; .155" diameter trimmer line is ideal for professionals cutting tough vegetation and underbrush; Fits several string trimmer models including, but not limited to: Remington RM1159; Check your user manual for maximum diameter fit-up; Made by Oregon, one of the most trusted brands for trimmer line Oregon Equipment Parts 22-855 Gatorline Magnum Square .155