A self-expanding stent delivery apparatus having a sheath comprising a hard and lubricious coating for the safe, effective and accurate deployment of self-expanding stents. One aspect of the invention provides a drill bit including a bit body and one or more blades positioned within the bit body, the one or more blades individually actuatable to a plurality of cut depths. Then, a resist pattern having an opening corresponding to a wire formation region including a region formed with the hole is formed by using a chemically amplified resist. When the stopper is detected by the stopper detector, the controller lowers a set value of the overspeed. In addition, the table may include one or more guard members that are sized and configured to protect portions of the table, such as the corners. On clicking a bookmark, if the page is not found, another close page is obtained by the client.