These 3/32" (2.35mm) shank burrs are modified for use with the angled head porting handpiece.
SE53: Single cut, egg shaped carbide, with 0.2" (5mm) diameter, for removing the bulk of material.
F5: Football shaped diamond point, with 0.2" (5mm) diameter, for blending and finishing port walls or removing stubborn plating that will dull the