The cross dentition divides the instruments into individual elements arranged alternately (crosswise). Short granular chips. Smooth cutting with almost no pressure. E/EF = fine/extrafine cross dentition for acrylics and metal alloys. ISO: 500 104 194190 040 - Maximum Speed: 100,000 rpm - ROUND CONICAL GRAIN Diameter: 040 - Shank: HANDPIECE - Application: TO FINISH ACRYLIC, PLASTER, AND METAL ALLOYS - Packaging Quantity: 1