These BAL Deluxe Tire Chocks work as a wheel lock. Fits between tandem tires, it locks wheels by applying force to both tires. Aids in trailer stabilizing and prevents your trailer or fifth wheel tandem tires from moving. A hand-operated plated ratchet wrenchturns a drive nut, extending the chocks against the tires for locking and retracting the chucks for removal. Requires 2-1/2" clearance between tires. Opens to 10".
They can even be used between tandem tires off the ground. They lock the wheels when opposing force is applied to the tires. A plated ratchet wrench with comfort bumper is included this helps to provide as much force as you need to engage the wheels.