The Swix T0424 is an ergonomic, high quality structure tool for cross-country skis. Easy to change between different rollers. All rollers have ballbearings for easy rolling. Delivered with 1mm linnear structure roll. An arrow show the correct direction of movement. Structure imprint will disappear after rewaxing with iron. For all levels. Structure rollers from T0410 fit to this handle and can be used if you want more options