Profile: OML Ltd. specializes in designing outboard motor locks. Ours locks are made of high grade (nickel/chrome marine 316) stainless steel, incorporating marine friendly Ifam or Alko lock mechanisms that perform well in a saltwater, marine environment, resulting in product longevity. We manufacture three bolt-lock models for through-transom bolted outboard engines. Each has a 13 mm diameter hole in the body unit. A brass reducing T-sectioned bush is available to reduce the hole to 10 mm. The Med bolt lock is a simple and outboard engine security solution popular with high volume boat builders. It is supplied with a black plastic dust cap.