DONBAR - Support Bar for Zero-Turn Lawn Mowers The DONBAR was developed to assist in the mounting and dismounting of a zero-turn lawn mower. The DONBAR provides stability and balance for people facing physical and/or strength challenges by offering an extra point of contact when climbing on and off a mower or moving from a sitting to a standing position. The device mounts on the foot plate of the zero-turn lawn mower (often using the plate's existing holes) and is secured by lock-nuts to resist loosening caused by vibration and torque. The DONBAR is compatible with a variety of zero-turn lawn mowers, including John Deere, Toro, Exmark and most others.