Seco shrinkfit holders are the slimmest possible way to hold round tool shanks with high precision and strong clamping forces, all without additional clamping screws or nuts. The bore in which the tool locates is slightly undersized compared to the tool shank. Heating the holder opens up this bore (with specialized heaters e.g. Seco’s EasyShrink® devices), allowing the tool to be inserted. As the holder cools, the bore shrinks 360° around the tool to create a concentric and rigid clamping. This achieves high material-removal rates through increased depths of cut and higher table feeds.