Disk cutter

A disk cutter comprising a cutter body, a plurality of tool holders and a plurality of cutting elements mounted to the tool holders, in which the tool holders comprise a body portion and a pair of spaced apart legs mounted about the cutter body, wherein the tool holders and cutting elements are provided in at least one set about the cutter body, each set comprising two or more tool holders and two or more cutting elements arranged in a pre-determined sequence of configurations, each individual tool holder occupying a position within said pre-determined sequence of configurations, wherein within each set a quantity and/or relative lateral spacing of cutting elements on each tool holder varies according to the tool holder's position within the pre-determined sequence of configurations, comprising a single cutting element in one or more of the tool holders, wherein in each set, the tool holders face the same forward direction, and wherein the cutting elements comprise diamond.