1/2 inch round preformed material swedged at each end to best fix ski contour fitted with 8 inch of 60 degrees turning carbide. Performance trail riders are known to use this runner. Provides proper balance with a studded track. Pack of 2. Note: The use of aggressive skis, ski carbide runners or studs will alter the handling of your snowmobile, particularly in terms of maneuverability, acceleration and braking. Please refer to your operator's guide for more details.