Abstract: Golf clubhead (1) made from metal, having a strike face (2) which has a loft angle &agr; of greater than 45°°, said strike (2) face having has a plurality of parallel grooves (10), characterized in that the strike face (2) has a surface roughness Ra of less than 0.25 micrometre, and in that the Vickers hardness of the strike face (2) is greater than 5 GigaPascal.

Abstract: A cosmetic procedure for hair transplantation is carried out with an apparatus (50) comprising a magazine (52) with a plurality of compartments (53) each containing a sample of de-epithelialized tissue having at least one hair shaft attached to a hair bulb. The magazine (52) is loaded in an apparatus (50) having a tapered hollow lumen (57) aligned with a pusher rod (56). With the hollow lumen (57) penetrating a recipient graft site to a predetermined depth and the pusher rod (56), the hollow lumen (57) and a compartment (53) in axial alignment, pusher rod (56) moves through compartment (53) and into the hollow lumen (57) to deposit a portion of donor tissue in the recipient graft site.

Abstract: A releasable tool holder (75) for quickly interchanging tools usable by a conventional robot (50) having one or more articulatable arms (60, 65, 70). The tool holder (75) is mounted to an arm (70) of the robot (50) and is provided with a plurality of variable fulcrum clamping levers (110) capable of engaging a surface (215) of a ring (205) mounting a preselected tool. A fluid motor (95) is connected to a translatable center link (105) that is pivotably attached to the variable fulcrum clamping levers (110) whereby when the motor (95) causes the link (105) to translate, the variable fulcrum clamping levers (110) engage the surface (215) of the tool mounting ring (205). A novel tool mounting ring (205) and a releasable fluid coupling (125) are also provided.