Abstract: The present inventions discloses an apparatus that may be used to quickly and easily adapt a typical snowmobile trailer and hold down system to a clamping type system. This system may then be used to hold and secure not only snowmobile but all terrain vehicles and lawn tractors to the bed of a trailer. These objectives are accomplished by the use of a clamp like device that bolts to the bed of a utility trailer. This clamp is used in conjunction with the commonly used retaining bar typically used to secure the skies of a snowmobile to the trailer. The clamp of the present invention provides a quick and secure way to fix the vehicle to the trailer and can be easily locked to deter the theft of the vehicle when it is left unattended.