An interface between a shank tool and a lubricant transfer area. The shank tool is arranged in a tool holder, and comprises a clamping section, a conical shank end and at least one internal lubricant duct comprising an orifice located in a tapered surface of the shank end outside a shank tool axis. The lubricant transfer area is provided in the tool holder, which encompasses an inner recess, and which narrows in the direction of a centrical lubricant feed pipe, the inner recess defining an inner cone supporting the conical shank end radially outside of the orifice. The conical shank end and the lubricant transfer area include a funnel-shaped lubricant transfer chamber, which extends between the centrical lubricant feed pipe and a tapered surface contact area between the inner cone of the lubricant transfer area and the conical shank end. Also, an adjustable screw for an interface as described above.