1,Used for milling chuck 2,Power clamping ability,high precision 3,Competitive prices 1,Size:C20,C32,C422,The detail specifications as follows: Cat.No.Holding rangeC20(6,8,10,12,16)C32(3,4,5,6,8,10,12,16,19,20,25)C42(6,8,10,12,16,20,25,32) Power collet