Thule 2 bike towbar bike rack
This Thule two bike rack is extremely easily fitted to the ball mount of the towbar on your vehicle. You just collapse it inwards by pressing the button behind the Thule sign (see picture with arrow), then expand it so that the bottom two cylinder shaped clamps attach to each side of the tow ball, then press down on the Thule cover to lock in place and secure with the padlock (included in purchase, see pictures). Can be done in literally five seconds by anyone, and then removed just as easily.