By California Vehicle Supply

The Spence Trailer Safety Lock is an effective deterrent against trailer/tractor theft, providing users with peace of mind knowing their trailers are secure!  Each device is an anodized, T-6 356 cast unit.  There are two different models to choose from:

STSL-1:  The STSL-1 is fully adjustable, highly visible, weighs less than 15 pounds, and is ideal for use with two- or three-axle trailers, recreational vehicles, or utility trailers. The STSL-1 provides added safety and security for trailers parked on an incline or trailers needing repair.

STSL-2:   The STSL-2 is a limited adjustable unit for three-axle tractors using standard width (11.5 inch) tires. This three-axle tractor unit is highly visible, weighs less than 25 pounds, and is ideally suited for three-axle tractors in a variety of environments. Like the STSL-1, this unit provides added safety and security when your tractor is parked on an incline, or when the tractor needs to be secure before repairs can be started.