D-I INDUSTRIAL Co., Ltd. is the leading manufacturer of marine transmission, marine steering system and power take-off in South Korea. Korean major manufacturers of the marine engine such as DOOSAN INFRA CORE (former DAEWOO Heavy Industries, Ltd.), are using D-I marine transmission for their engines. And the local authorized distributors of the major marine engine like Cummins, Volvo Penta, Caterpillar, Scania and John Deer are also choosing D-I marine transmission as the best option of marine transmission for their engines.