... .Made in spring steel and rang from 1-30mm 3.Precision:0.005mm to 0.015mm 4.ER8 collet to ER50 ... ,11/21,3/8,13/32,7/16,1/2,17/32,9/16,5/8YS0543ER3233401/16,3/32,1/8 ... ,11/21,3/8,13/32,7/16,1/2,17/32,9/16,5/8,21/32,11/16,3 ... /2,17/32,9/16,5/8,21/32,11/16,3/4,7/8,1YS0545 2012 Furuida Hot Selling Precision Collet ...