The patented RWS wheel mounting system from DT Swiss is rigid, safe and easy to operate. The Plug In version offers all the advantages of tool-free mounting of the quick-release axle if you wish. If you prefer the clean look of a screw-on axle, simply pull off the lever unit and store it in your jersey. Or leave it at home. There is a 5 mm hexagon on the axle which can be operated with any standard tool. On the lever unit there is also a 5 mm hexagon which can of course also be used as a mini tool on the road. Clean and smart: The RWS Plug In.