Swix Structure Roller Tool w/ 0.5mm V-Roller. Swix model T0423. An economic and practical structure tool. Adding structure to the ski base for varying snow conditions significantly improves the gliding properties of skis. Delivered with ball bearings for easier rolling. Strong and stable body. White arrow to show correct moving direction. Delivered with standard broken 0.5mm V-roller, which is recommended Medium Cold snow conditions, Air Temp 23F to 32F. Structure imprint will disappear after re-waxing with iron. Its simple to change the roller out for other structure rollers.