Transmetal cylinder bur recommended for cutting crowns and bridges (gold, nickel-chromium and other non-precious alloys). The active axial part is applied to the surface to be cut with moderate pressure. An alternating up and down movement improves the efficiency of the bur. Recommended speed: between 120,000 and 180,000 rpm. Spiral drill with extra-fine cross cut guaranteeing effective debris removal (no accumulation), hence preventing heating.