For protein and DNA extraction.The small but powerful handy homogenizer handheld unit and matching high performance pestles will make your repetitive labaoratory procedures easier, faster, and more reproducible. Great for protein or nucleic acid extractions!Features: Electromotion Homogenizer Unit- Completely portable: runs for hours on standard or rechargable AAA batteries- Lightweight: -78g with batteries- Two models: high speed or low speed / high torque- Snap - fit system for easy-on / easy-off pestle exchangePCTFE Homogenizer Pestles- Ultra hard PCTFE polymer tips insure smooth grinding surface, long life, heat and chemical resistance- Fully autoclavable- Perfect fit for standard 15 ml, 1.5 ml, 0.5 ml tubes, or microliter sized V-vials- Unique grooved tips (G-types) prevent sample trapping to insure complete homogenization