Tapping Adapter, Tap Size #8, 5/32 in, Tap Square Size 3.33mm, Compatible with Product Type K-Series Double Angle Collet Chucks, Coolant Fed Non-Coolant Through, Features Design of Slots in Back of Collet Acts as a Drive for the Tap Square;Industry Standard Erickson Double-Angle Collet System;Provides Positive Drive for Tapping Applications