an arm having a T-shape including a tongue and two wings extending transverse to the tongue;

a pair of pneumatically or hydraulically driven cylinders, each cylinder being located on a respective wing and being extendable and retractable vertically and substantially perpendicular to the wings in response to application of and withdrawal of pneumatic or hydraulic pressure, respectively, each cylinder including, at an upper distal end, a first bearing portion for engaging a member of a vehicle to be towed, wherein the cylinders have a minimum vertical extension relative to the wings when no pneumatic or hydraulic pressure is applied to the cylinders; and

a pair of non-retractable supports, each non-retractable support being mounted on a respective wing proximate a respective cylinder, projecting vertically and substantially perpendicular to the respective wing, each non-retractable support including, at an upper distal end, a second bearing portion for engaging the member of the vehicle to be towed, wherein

the non-retractable supports extend, vertically and perpendicular to the wings, a distance longer than the minimum vertical extension of the cylinders, and

each of the first and second bearing portions includes a concavity for retaining the member of the vehicle to be towed.