Item Type: Collet Chuck Seat Model: ER25-D80 Diameter: Approx. 80mm / 3.15in Accuracy: 0.005 Material: Carbon steel Application: Used to hold tools 1FOR LATHE OR MILL: Collet chuck seat can be mounted to a backing plate of your choice for use on a lathe or as a fixture on a mill 2OXIDATION RESISTANT CARBON STEEL: Made of good quality carbon steel material, come with strong oxidation resistance and high hardness 3FOR ENGRAVING MACHINECollet chuck seat is suitable for CNC milling machine turning tool engraving machine, provide great convenience 4HIGH ACCURACY: Diameter of chuck seat for 80mm, accuracy is 0.005, used for clamping toolsuseful and practical 5STABLE AND DURABLE: ER25 collet chuck come with stable structure, excellent performance and long service life1 x Collet Chuck Seat