APEXX Orange High Speed CNC Finger Bit for Granite & Quartz Surfaces. Diameter: 25mm. Height: 70mm. RPM: 4500-5500. Feed Rate: 15-20 IPM. Built for high-speed cutting on Engineered Stone and Granite. Available in various diameters and diamond lengths. One of the most popular CNC finger bits in the market. Bottom segment version is available for 20mm diameter. Fit all standard CNC machines. Material: Engineered Stone, Granite. Color: Orange. Thread: 1/2" Gas. Wet use only.