The Enforcer 4 x 4 (patent pending) is a cheaper alternative for a scrum machine, yet it is still very effective. It can be easily fitted to a Hayman- Reece style tow bar either on a 4WD or on another style of motor vehicle.

This machine relies on the motor vehicle's handbrake or foot pedal brake to provide resistance. Naturally, the 4 x 4 is readily transportable and is ideal for clubs without storage facilities at their training ground.