The city is base to around 40 percent of India's automobile industry and 45 percent of auto components industry.[265] A large number of automotive companies including Royal enfield, Hyundai, Renault, Robert Bosch, Nissan Motors, Ashok Leyland, Yamaha Motor, Daimler AG, Caterpillar Inc., Komatsu Limited, BharatBenz, Ford, BMW, Citroën and Mitsubishi have manufacturing plants in Chennai.[266] The Heavy Vehicles Factory at Avadi produces military vehicles, including India's main battle tank: Arjun MBT.[267] The Integral Coach Factory manufactures railway coaches and other rolling stock for Indian Railways.[268] The Ambattur–Padi industrial zone houses many textile manufacturers, and a special economic zone (SEZ) for apparel and footwear manufacturing has been set up in the southern suburbs of the city.[269] Chennai contributes more than 50 percent of India's leather exports.[270]