Stainless Steel Grinding Parts: Whole grinding mortar and probes adopt steel material, durable for repeated repeated tissue grinding; matched interchangeable 3mm, 4mm and 6mm rods for different sample sizes without extra accessories. Rechargeable Cordless Handheld Design: Built-in rechargeable battery removes power cord limits; lightweight ergonomic shape supports easy one-hand operation on lab benches, field sampling and laminar flow hoods. 3 Adjustable Speed Gears 5000-18000RPM: Three optional speed levels fit various samples; low speed for soft animal tissues, high speed for hard fibrous plant samples to get uniform grinding effect. 15mL In-Tube Grinding: Grind tissues directly inside standard 15mL centrifuge tubes, skip extra liquid transfer steps and cut loss of precious samples for plant and animal tissue research. Detachable Easy-Clean Grinding Assembly: All grinding parts can be quickly taken apart without tools for thorough cleaning.