The invention provides for a tool component comprising a layer of polycrystalline diamond (12) having a thickness of up to 100 microns and a working surface (16). A softer layer (20) containing a metal selected from molybdenum, tantalum and niobium is bonded to the working surface (16) of the polycrystalline diamond layer (12) along an interface. The metal of the softer layer (20) is in the form of the metal carbide, the metal or a combination thereof and is present in the region (22) of the layer of polycrystalline diamond (12) adjacent the interface.