Introducing a new, patented design of interface between insert and tool holder. The new exchangeable-head milling system has none of the problems inherent in existing exchangeable-head tools. In recognising that the ultimate performance depends directly on the quality of the coupling, the design of this new system guarantees a reliability and accuracy in the coupling between the carbide head and the tool shank to provide top class machining. SM - Straight design 90 - Medium length EH Coupling - a New Unique Interface for Milling Tools Simple, Easy, Economical * Full face and taper contact for best stability. * Coupling designed for minimised bending. * Patented thread profile. * Manufactured with tight tolerances for best performance. * Various heads fit one shank for ultimate versatility and reduced inventory. * Shortened index time to increase your output and raise productivity. * Wide range of shank options to find best combination of accessibility and stability.