AccusizeTools - 18 Pcs ER32 Collet Set 3/32'' to 25/32'' in Fitted Strong Box, 0223-0880 Concentricity: 0.0004&#039;&#039; Design affords highest gripping power True double angle for better accuracy 16 jaws for powerful gripping and parallel clamping 18pc ER32 chucks set includes the following collet sizes: 3/32&#039;&#039;, 1/8&#039;&#039;, 3/16&#039;&#039;, 7/32&#039;&#039;, 1/4&#039;&#039;, 5/16&#039;&#039;, 11/32&#039;&#039;, 3/8&#039;&#039;, 13/32&#034;, 7/16&#039;&#039;, 1/2&#039;&#039;, 17/32&#039;&#039;, 9/16&#039;&#039;, 5/8&#039;&#039;, 21/32&#039;&#039;, 11/16&#039;&#039;, 3/4&#039;&#039;, and 25/32&#039;&#039; In fitted strong case