Estwing Chisel Edge Rock Picks Geological Hammer we offer is used by many geologists. This is suited for splitting as well as breaking rocks. The said unit is highly appreciable in the field of geology. This is essentially used to attain the fresh surface of rocks. Estwing Chisel Edge Rock Picks can determine the nature, mineralogy, and composition of rock strength. It works as an absolute necessity for field work. They can be used with precision and efficiency.