Ski-Doo Carbide Runner-Pilot skies, Except DS & DS-2. Preformed 8" 60 Degree. The Dooly by Woodys has two 7/16 Flat-top runners mounted on a plate for each ski. Four contact lines on snow surface help decrease darting of sled as it makes its own groove in a trail. When in a turn, only one of the Dooly bars is in contact with the snow or ice. A Dooly with 4, 6, or 8 of carbide on both runners provides the same turning power as a single runner with 4, 6, or 8 of turning carbide. Sold individually.