Unique Long 5 in 1 Nail Drill Bit: The bits are designed with a longer head and a large contact area which is faster and more convenient for removing & polishing acrylic nails than other bits. Extreme sharp teeth design allows you to remove acrylic nails, hard nails, gel extensions, and thick nails, and dip powder with little pressure, making your nail removal a breeze. Two Rotate Direction: Designed to cut smoothly in clockwise and counter-clockwise directions for both two hands. Works for both left and right hand, you can choose the direction in a different situation. It needs that a nail drill that has a forward and reverses function. Professional Nail Drill Bits: Made of the hardest YG6X carbide tungsten material, this high-precision machining nail bit comes with excellent heat dissipation, low vibration, low noise, and hard-wearing features.