 Additionally, the skiving process also increases the roughness of the fins.Unlike the underside of a heat sink, which needs to be smooth for maximum contact area with the heat source, the fins benefit from this roughness because it increases the fins' surface area on which to dissipate heat into the air.The fins may be made much thinner and closer together than by extrusion or formed sheet processes, which can offer greater heat transfer in high-performance waterblocks for water cooling.