A cutting tool or wear surface having diamond particles chromium mounted thereon. The animal rescue step has a foam core covered by a waterproof fabric and floats adjacent to the side of the swimming pool. A communication link between the probe and the test set has a predetermined propagation delay, from which the system can calculate a propagation delay of the conductor between the test set and the probe, and a propagation delay between the probe and the anomaly. Further embodiments of the DTT may allow determination of the throughput of a data system under test under the condition that specific performance characteristics of the data system under test satisfy pre-defined benchmark parameters. A video portion of the first audiovisual signal or the second audiovisual signal is displayed on the first video monitor, on the second video monitor, or on both the first video monitor and the second video monitor.