Feature:1. Secure Fixing: Can be mounted to a backing plate for use on a lathe or as a fixture on a mill, very safe and reliable.2. Standard Size: Comes with 80mm diameter, this milling machine collet promises 0.005 high accuracy up for stability.3. Perfect Match: Allows for wide utilization on CNC milling machine, turning tool, engraving machine and other equipment.4. Good Material: Adopting premium carbon steel material with good hardness, also very durable with oxidation and long use.5. Easy to Install: Designed to have a light weight and a compact size as well, the installation is simple to complete.Specification:Item Type: ColletModel: ER32-D80, 7 holes. Diameter: Approx. 80mm / 3.15inAccuracy: 0.005Material: Carbon Steel.Package List:1 x ColletNote:Before inserting the collet chuck, the collet must be assembled into the collet chuck nut.