The Doc Johnson x Motorbunny - Buck with Vac-U-Lock offers the signature powerful vibration of Motorbunny with the "full stroke up to 11" feature and includes two separate penetration motions. Compatible with Vac-U-Lock, this mechanism provides endless possibilities for targeted, adjustable stimulation and intensely orgasmic experiences. It is compatible with hundreds of other Vac-U-Lock attachments for a new experience every time.