The Jac-Loc is made for the Belly Dump trailer. The lock will secure your belly dump whether it is sand, rock, or asphalt. Jac-Loc is intended to prevent the accidental release of your load.
Every Belly dump driver has lost a load or known someone that has. Driving down the road and losing your load is a very dangerous and costly accident.
When used properly and maintained in good working order, Jac-Loc can allow you to secure your load automatically from the comfort of your front seat.