Professional Nail Drill Bit Set: The corn nail drill bit set contains 1 extra fine drill bit, 1 fine drill bit, 1 medium drill bit, 1 coarse drill bit and 1 extra coarse drill bit. Ideal for professional technicians or nail art beginners. Premium Ceramic Material: These manicure tools are made of ceramic that is strong, sharp, durable and beautifully crafted. Strong enough to remove hard gel nails with little to no friction and heat, and creates less dust. Easy to clean: tip does not clog nails, you can easily clean nail bits or dirt with a nail brush, protect the tip after each use, and keep your nails healthy. Fits most electric nail drills : Universal 3/4" size fits most professional electric nail drills, ideal for nail salons, salons, spas or manicures and pedicures for personal manicures at home. Bi-directional rotation: both left-handed and right-handed can use it. Available in different shapes and sizes to meet different kinds of needs, you can easily and quickly reshape, buff, smooth, sand and sculpt acrylic nails.