G'day Douglas,

I've had a look at some images of the Alko Off Road Hitch online and unfortunately I don't think it will fit due to the shape of the hitch itself. Unfortunately we don't have a way of checking this for you, as we don't have an alko off-road hitch to try it out with.

G'day Ross,

We weren't familiar with the Hitchmaster DO35, but having a look at the shape online we don't think the Milenco Heavy Duty Hitch Lock will work. It looks like there is a specific locking pin available for the DO35 so I would say that will be your best option. 

G'day Phil,

We've just double checked and unfortunately, we don't think the Milenco Heavy Duty Hitch Lock & Chain Lock will fit a 70mm tow ball hitch. Unfortunately, there are no security devices that we stock that will fit a 70mm hitch.

G'day Brian,

I've just double checked and the lock is designed to fit the ball style hitch.