Optimum™ Surgical Burs are designed for Strength, Durability and Performance. They are manufactured using the highest grade tungsten carbide and stainless steel. Their special design ensures fast, smooth, vibration free cutting performance. Engineered to cut cool with less clogging. Economically priced and satisfaction guaranteed! Solid one-piece carbide construction ensures increased strength at high speeds while greatly minimizing breakage. (FG) Friction Grip length: 25.0mm/.984" long - Length: 25.5mm