Sel 750 K16 External Threading Holder 3/4" Square Shank Left Hand External Lay Down Threading Holder For Size 16 Inserts Sel 750 K16 External Threading Holder 3/4 Inch Square Shank Left Hand External Lay Down Threading Holder For Size 16 Inserts Ading Holder For Size 16 Inserts Tmx Toolmex Part #6-Sel-750-K16