Upgraded Material Does not dull as easily as others with upgraded tungsten carbide material These drill bits for nails also have improved precision when cutting are durable and longlasting versatile ecofriendly More Complete Combination Come with 13pcs different styles and sizes of nail drill bitsGrits to remove polishes nail extension materials and cuticles Safeguarded bits to protect skin during removals Fit for most 332 nail drill Fit most electric or rechargeable manicure nail file machine Perfect for nail salon beauty parlor spa or personal manicure pedicure DIY nail art at home Safe to Use All the nail drill bits for acrylic nails are smooth and dont heat up Protects the skin from being harmed Easy to StoreClean You can easily use the brush for cleaning cuticles and acrylic The case is convenient for travel or just to stay organized