• ONYX TAP – for tapping a wide range of materials up to 28Rc hardness.• CNC Style enchances chip evacuation and cutting fluid flow to the cutting teeth for reduced friction, heat and galling. Also reduces contact between the tap and the workpiece.• Semi-Bottoming Style are designed to lift the chips sout of the hole in blind hole tapping, eliminating chip evacuation problems which can result in damaged threads and broken taps. They will also bridge opeings, keyways and other interruptions in the tapped hole.• Bright Finish for tapping a wide range of materials including Non-Ferrous materials. Tool coatings can be added for enchanced performance & tool life.