A method of producing a tool (1,22) for cutting, drilling or crushing of solid material, said tool comprising a cemented carbide body (2, 19) attached to a steel holder (3, 21), wherein said method comprises the steps of - providing said cemented carbide body (2, 19) by; - providing a powder mixture, - compacting said powder mixture into a compact (4, 13) comprising a hard phase mainly comprised by tungsten carbide, WC, and a binder consisting of cobalt, wherein the cobalt content of the compact (4, 13) is at a cobalt content level and is ≤ 5.5 wt%, - providing a compound comprising a carbide or a nitride formed by carbon or nitrogen and an element that has a grain growth inhibiting effect on tungsten carbide, and providing an element that has a grain growth promoting effect on WC, - applying said compound and said grain growth promoting element onto at least a tip region (5, 16) of said compact (4, 13), wherein said tip region (5, 16) will form a tip region (6 23) of the cemented carbide body (2, 19) aimed for engagement with material to be cut, drilled into or crushed by means of said tool (1, 22), and keeping a base surface (7, 14) of the compact (4, 13), which will form a base surface (8, 20) of the cemented carbide body that will be attached to said steel holder (3, 21), free from said compound and grain growth promoting element, - wherein said compound and said grain growth promoting element is of a type that will diffuse into the compact (4, 13) in connection to sintering of the latter and thereby will induce a generation of a cobalt content gradient in the sintered compact (2, 19), with an increasing cobalt content in a direction away from a surface onto which said compound and said grain growth promoting element has been applied, - sintering the compact (4, 13) provided with said compound and said grain growth promoting element into said cemented carbide body (2, 19) such that the cobalt content at said base surface (8, 20) being cobalt content level becomes ≥ 4.5 wt% as a result of said induced generation of a cobalt content gradient, the ratio cobalt content level to cobalt content level is ≥1.09, and - attaching said base surface (8, 20) of the cemented carbide body (2, 19) to the steel holder (1, 22) by means of brazing. - providing said cemented carbide body (2, 19) by; - providing a powder mixture, - compacting said powder mixture into a compact (4, 13) comprising a hard phase mainly comprised by tungsten carbide, WC, and a binder consisting of cobalt, wherein the cobalt content of the compact (4, 13) is at a cobalt content level and is ≤ 5.5 wt%, - providing a compound comprising a carbide or a nitride formed by carbon or nitrogen and an element that has a grain growth inhibiting effect on tungsten carbide, and providing an element that has a grain growth promoting effect on WC, - applying said compound and said grain growth promoting element onto at least a tip region (5, 16) of said compact (4, 13), wherein said tip region (5, 16) will form a tip region (6 23) of the cemented carbide body (2, 19) aimed for engagement with material to be cut, drilled into or crushed by means of said tool (1, 22), and keeping a base surface (7, 14) of the compact (4, 13), which will form a base surface (8, 20) of the cemented carbide body that will be attached to said steel holder (3, 21), free from said compound and grain growth promoting element, - wherein said compound and said grain growth promoting element is of a type that will diffuse into the compact (4, 13) in connection to sintering of the latter and thereby will induce a generation of a cobalt content gradient in the sintered compact (2, 19), with an increasing cobalt content in a direction away from a surface onto which said compound and said grain growth promoting element has been applied, - sintering the compact (4, 13) provided with said compound and said grain growth promoting element into said cemented carbide body (2, 19) such that the cobalt content at said base surface (8, 20) being cobalt content level becomes ≥ 4.5 wt% as a result of said induced generation of a cobalt content gradient, the ratio cobalt content level to cobalt content level is ≥1.09, and - attaching said base surface (8, 20) of the cemented carbide body (2, 19) to the steel holder (1, 22) by means of brazing.