The Highland Railway K class were the only class of 0-6-0 tender locomotives built for the Highland Railway. They were introduced in 1900 to the design of Peter Drummond. The class were known as ‘Barneys’.They were fairly standard for British practice of the time inside cylinders with 5 ft 0 in (1.524 m) diameter driving wheels and a general Drummond family appearance.The first six (nos. 134 to 139) were built by Dübs and Company in 1900.