Speedster LongHead preparation and bulk reduction burs offer familiar diamond bur shapes in a carbide bur construction. Advanced designs and aggressive rake angles provide the means to create a longer lasting, concentric, smoother cutting instrument that rapidly reduces materials such as amalgam, gold, porcelain, enamel and PFM. FG-shank, Flat End Taper Cross Cut, head diameter 1.4mm, length 8mm.