This report describes the results and conclusions of the further development of a previously developed lightweight probe drill for use in anthracite mines. The improvements included (1) better hole cleaning due to the development of an air-water mist flushing system, (2) the application of roof drill bits to allow drilling through rock seams and lenses, (3) the development of a quick coupling drill system that reduced total steel change time, and (4) adaptation of a swivel to the drill anchoring system that greatly reduced set-up time between holes. With these improvements, the probe drill drilled the required 11 holes in one shift and gained miner acceptance as a viable underground working tool. The probe drill proved to meet all design requirements of portability, low- weight drilling controllability, structural integrity, and reliability. In addition to drilling the required probe pattern, the probe drill is capable of drilling long holes. By drilling several holes over 80 feet deep the probe drill has the potential for use in robbing pillars and for methane drainage.