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. Round trimmer line – the most popular trimmer line shape. Offers effective cutting for a range of applications. More durable and longer lasting than square trimmer line. .105" diameter trimmer line is a good size for cutting heavier weeds in your lawn or performing light commercial work.