"Superclamp Superglides II Pro snowmobile and ATV trailer ski guides increase traction and help prevent accidental slips. Each package includes (8) 8.5"" x 30"" ski glide pieces for 20 feet of coverage with a grommet and 48pc shoulder screw hardware mounting kit. Superglides a great for snowmobile or ATV use, and feature a moisture minimizing vent system to prevent and reduce wood rot."