A surgical tool in the form of a three piece bone graft inserter includes a pair of concentric cylinders having elongated apertures formed in the side walls of the cylinders to allow the interior of one of the cylinders to be loaded with the bone graft material, and a plunger that extends through both cylinders. In other words, while a bit of coding efficiency is lost due to the provision of the new syntax portion, it is merely the new syntax portion which provides for the ability to use the codec in case of a communication channel with frame loss. The first blade includes a coupler arrangement for connecting together media segments. The compressive strength of the test cement composition consisting essentially of: the cement; the water; and the additive at a final time of 72 hours has a percent change greater than \u22125% from the compressive strength of the test cement composition at an initial time of 24 hours when tested at a temperature of 300\xb0 F. The rotary encoder further includes a resin-molded case, a shaft, a gear-shaped rotor, a click mechanism and a tact switch mechanism.