When a cap is not properly secured, sample evaporation occurs. Tightening a cap too tight or too loose will compromise sealing performance. The new Micronic Screw Cap Recapper CS100 was designed to help researchers ensure that screw caps are tightened securely and uniformly on sample storage tubes. The CS100 is set to a precise torque value to ensure that screw caps are optimally tightened onto tubes. The tool stops turning when the perfect seal is established, eliminating the risk of overturning the cap. The handheld tool enables users to cap, decap, or recap tubes in the laboratory or in the field. The manual tool needs no batteries, is made from stainless steel, and provides an ergonomic solution for left- and righthanded use. The tool can be used for 96-, 48-, or 24-well format tubes with internal or external thread.