1、Premium Stability: The collet can hold and connect the tools to CNC machine, which also ensures stable working performance under high speed. 2、Wider Application: Widely applied to machining centers, CNC grinding machines, engraving machines, high speed machines, and other processing. 3、Includes 3 Pieces: There are 3 pieces C25 collet of 16mm, 18mm and 20mm specification, better satisfying your various needs for manufacturing. 4、High Carbon Steel: Premium high carbon steel material has been through excellent workmanship, has high elasticity, very durable for long using. 5、Simple to Install: Comes with a light weight and a compact size as well, the collet chuck holder is very convenient to install within minutes.