Reversible tapping chuck 1)Automatic reversible the spindle after tapping over. 2)Size:for M2-M7,M5-M12,M8-M20 Reversible tapping chuck:Flexible collet available A set includes two shanks, two spanners, three blocks and two flexible collets Three type: J467 for M2-M7 J4612 for M5-12 J4620 for M8-M20 Morse taper: 1, 2, 3