Features No Lubrication Needed: Aviation lubrication is not required, allowing for hassle-free maintenance and ensuring a long service life with special high-performance grease Easy Tool-Free Removal: The innovative design of the inner and outer bearing rings allows for quick and easy removal without the need for special tools, saving you time and effort Compact & Quiet Operation: This small and compact pneumatic turbine vibrator operates at very low noise levels, making it ideal for various applications without disruptive sound Durable Aluminum Alloy: Constructed from lightweight and resistant aluminum alloy, this air turbine oscillator withstands harsh environments, ensuring longevity and reliability Versatile Industrial Use: Perfect for a range of applications including vibrating tables, filter screens, silo emptying, and bulk material compaction, enhancing efficiency in your operations Features: 1、Firstly position at an oblique angle of 45 degree, then drill the hole vertically (note low speed about 800-1000rpm). 2、Fit for bench drill, power drill and machine tools with drilling function but not for impact drill (Cannot use the impact function to drill). 3、Suitable for drilling on stone, ceramic, vitrified tile, glass, etc. You need to constantly adding water to cool in the proc of drilling. 4、The cutting edges of drill bit adopts section design for reduced cutting resistance, also conductive to chip removal. 5、Universal triangle drill shank can effectively prevent skidding during drilling and bear more torque. 6、Long oval hole on the drill bit is more conductive to the discharge of the chippings. Specification: Specification (Optional)58mm / 2.28in Package List: 1 x Drill Bit Package List 1 x Drill Bit