2. The compact chucks are small volume,easy to be used and enjoy a high centring as well as a large clamping range. 1. The chucks have two mounting types;the short cyindrical center mounting and the thread mounting. 3. The chucks are made for meter machine tools in the processing of non-ferous metals,non-matals like plastics and so on 4. Mainly used for machine tools in the processing of non-ferrous metals and non-metals., Weight: 1.15963149812 pounds, Manufacturer: Aisuoka