A knife includes a body that includes a handle section, a substantially circular blade housing section, and a blade including a cutting edge having substantially the same radius of curvature of the blade housing. The olefin-based block copolymer can be prepared by reacting an hydroxyl-functional, saturated or substantially saturated olefin polymer with a chain-extension reagent that is reactive with hydroxyl groups and will polymerize in a head-to-tail arrangement of monomer units. The halogenated xanthenes constitute a family of useful chemotherapeutic agents that afford selective, persistent accumulation in certain tissues. Some embodiments employ a reconfigurable bit that deploys extensions as needed to dynamically vary the cross-section of the borehole at selected locations. The information permits the decoder to reduce visual artifacts in the interpolated frame and thereby achieve improved visual quality. The coil mounts contact the surface of the PCB to form an electrical connection.