This pneumatic hand held rock crusher for prospecting is 7.75" x 2" with a .400" outside diameter end that mounts in hammer. This air hammer attachment is custom made for the modern day gold prospector or miner. Fits in the average hand held pneumatic air hammer.  Fits most pneumatic rock crushers. Pulverizes hard quartz easily. Stands up to abuse of crushing hard rock. Makes sampling ore a piece of cake. Will crush rock below a 60 mesh in seconds. This mining rock crusher takes the work out of crushing rock before panning, processing, or chemical or fire assaying. Very heavy and rugged. Requires little effort for anyone to crush hard rock.

See Our Video of It In Action: