Friction Grip Burs (FG) are typically used in high-speed handpieces. iM3 recommends disposing of the burs between each patient. The extra length provides greater access in a large mouth. Package contains 5 sterilizable burs. The extra length provides greater access in a large mouth. These burs are 25 mm long and are suitable only for use with high-speed handpieces L5100/L5200/L5300 LED Advantage.