Disclosed herein is a foot protection device adapted to protect feet when training and playing fighting games. A blow-molding or stretch blow-molding machine including such a device, in particular for controlling the movement of the lengthening rod, or for controlling mold lockingunlocking, or for controlling mold openingclosing. 5-50 microns, having an austenite finish temperature Af below 37 C. Because a wide variety of caged diimide ligands are easy to prepare from commercially available dienes and dienophiles, the invention enables the preparation of a new family of single-site catalysts. The at least one hard face interface member is both mechanically interlocked with, and metallurgically bonded to, the shroud portion. A sliding interface is disposed along the side wall of the reservoir for slidably receiving and securing the carrier along a captured alignment path.