Model : Super Z , SZ 137 Never used . The chains were carried for possible use on Mount Washington. Selling as we sold the car that they fit. Designed for cars, pickups, and SUVs with very limited operating clearance around the drive tires Fast easy installation with no need to move the vehicle Designed-in rubber tightener means there is no need to stop and retighten after installation Better all-around traction performance than conventional tire chains or cables Better compatibility with anti-lock brakes, traction control, all-wheel drive, and other electronically monitored control systems