The 6770 Freezer/Mill is is suitable for the applications like cryogenic grinding and pulverizing of tough and/or temperature sensitive samples immersed in liquid nitrogen. Samples with sizes ranging from 0.1 up to 4 g are pulverized by magnetically shuttling a steel impactor back and forth against two stationary end plugs. Since the vial is closed, the integrity of its contents is maintained: hazardous or critical samples are easily controlled, cleanup is simplified, and crosssample contamination is eliminated.