[Oval type (EX Fine)]

[Cylindrical type (course)]

[Cylindrical (Fine)]

[Cylindrical (Medium)]

[Bullet type (course)]

[Oval (Fine)]

Polaris 3687 Ceramic Bit, Cylinder Type (Fine) This ceramic bit is light, durable, and does not hold heat. Uses ceramic and zirconia, which is said to be hard next to diamond. Compared to metal bits, it is less likely to generate heat than metal bits, so the surface is less likely to burn, discolor, or melt when cutting plastic, resin, or wood. Because it is lightweight, it does not shake easily, even if you increase the number of revolutions, it can be used for stable processing. Low abrasion and rust resistant for long lasting use. Also, it does not clog easily, so it can be easily cleaned with water. It can be disinfected with alcohol disinfectant, so you can use it hygienic. Due to the nature of ceramic, it is vulnerable to impact drops, so it may crack or chip if dropped repeatedly. Shaft Diameter: Φ0.09 inches (2.34 mm), Length: Approx. 1.5 inches (39 mm), Blade Length: Approx. 0.6 inches (14 mm).