A chain saw case has an adjustable scabbard that telescopes to allow for different lengths of chain bar. The cache comprises a data memory storing a plurality of cache lines and a tag memory storing a plurality of tags. A first resonant frequency is determined by a length of the rectangle-shaped micro-strip antenna. In communication with the processes, the communications interface receives resource data requests and processes the requests with the resource data. The add-on polishing structure can be attached to the main polishing structure to form a larger polishing structure with the additional polishing table and the additional polishing head. The implants have opposite arcuate portions with lockable screws passing therethrough for engaging each of the adjacent vertebral bodies.