This group of collets has 7 inches and 3 mms. Inch sizes are: 1/32, 1/16, 1/8, 5/32, 1/4, 9/32, & 5/16 inch, and metric sizes are: 2, 5, & 7mm. Collet chuck's back plate mount hole is M14 x1, this is for Unimat 3 or Emco Compact 5.
Box is a custom hand made, please see photos for details, and feel free to ask questions, thank you for looking. International Buyers - Please Note.