Our ER collet is power champing ability,precise accyracy used for boring,milling grinding and engraving operation etc. Tyep: ER colletApplications: used for boring,milling ,drilling,tapping,grinding and engraving operation ans so on .power champing ability,precise accyracy.......Item NODER113.175 ,4,6ER163.175,4,6,8,10ER203.175,4,6,8,10,12ER253.175,4,6,8,10,12ER323.175,4,6,8,10,12 ER collet