Class M10 is a mainline diesel-electric locomotive built by Banaras Locomotive Works, India, which is the largest diesel-electric locomotive manufacturer in India, for Sri Lanka Railways and constructed in 2012. M10 is similar in appearance to DLW WDM3D but specifications are somewhat different. This is one of the longest locomotive types in Sri Lanka. These Locomotives are for the Sri Lanka Railways as part of the ongoing Northern Railway reconstruction project.