bal deluxe tune locrins choice members provides added stabilization and prevents tire shifts by applying opposing save best seller! extends 10" to 17" to accommodate wide track axle spacing bal includes padlock and 3 keys bal pv producis group installs in seconds to hold trailer steady adjustable for wheel spacing from all steel construction mfr limited lifetime warranty eliminates front-to-back rocking motion when applied trailer or 5th wheel tires for added stability secure tandem tires to prevent movement while parked or supercenters nationwide