WolfPac 4100 is a 40-inch-wide, double-drum drive, double-drum vibration asphalt roller for use in confined areas. The operator can direct the vibration to both drums, the front, or the rear. An electro-hydraulic circuit combined with a custom-designed manifold allows the operator to activate the vibration where needed. It's powered by a 24.8-hp water-cooled Kubota diesel engine.