Disclosed are once-daily formulations containing tetracyclines, especially doxycycline. The golf shaft is produced by baking a plurality of fiber prepreg layers. In an example embodiment, systems and methods provide techniques for setting the low boundary value and the high boundary value. This forms through-holes in the secondary mould. With the secure holes mounted around the fasteners, the burglarproof cover is difficult to be removed from the case and the sleeves are protected against burglars.