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、Advanced powder platinum production technology with vacuum sintering can greatly increase the service life. 2、You can position at an oblique angle of 45 ° and drill in a vertical position. Meanwhile, it is noted that the rate cannot be too fast, and the rate should be slowly operated at about 800-1000 rpm. 3、Hole opener can be used on bench drills, hand drills and drilling machines but not on impact drills, which means it cannot be opened with impact function. 4、Furthermore, such drill bits are suitable for all kinds of stone, ceramics, vitrified brick, glass, etc. And, you shall constantly add water to cool down while punching. 5、The segmented open hole design of the drill bit has a small cutting resistance and it is good for chip removal. 6、Universal triangle drill shank effectively prevents slipping during drilling and withstands greater torque. 7、All patterns have chip removal holes, and the oblong design is more conducive to chippings discharge. Specification: Item Type: Hole saw drill bit Size(Optional): Hole Opener SizeApprox. 54mm / 2.13in Package List: 1 x Hole Saw Drill Bit Package List 1 x Hole Saw Drill Bit