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、5Pcs in 1 Set: The set includes 5pcs cross spearhead drill bits, which are sufficient in number and are often used with electric hand drills. 2、Cemented Carbide: Made of excellent cemented carbide materials, with proof treatment, high hardn and wear resistance. 3、With Hex Handle: Has standard 1/4in hex handle, which can be easily and safely installed on power tools and locked firmly. 4、Cross Spearhead: Reinforced cross spearhead design can prevent the drill from cracking and prolong the service life of the drill. 5、Multiple Usages: Suitable for glass, ceramics, mirrors, plant pots, wood, porcelain, brick wall, marbles, thin iron plates, etc. Specification: Item Type: Cross Spearhead Drill Bit Material: Carbide Purpose: Used for perforating ceramic tiles, concrete, wood and glass Aperture: Approx. 12mm / 0.5in Drill Bit Style: Cross spearhead Handle Type: Hex handle Handle Size: 1/4in Adaptation Equipment: Electric hand drill, etc. Package List: 5 x Drill Bits 1 x Plastic Box Note: Please try to keep the drill bit vertical when using it, and keep the drill bit cool under the condition of cold water flowing, and do not use it for hard tiles. Package List 5 x Drill Bits 1 x Plastic Box