Stainless steel shank with diamond tip, hard-wearing, durable, anti-corrosion with excellent heat dissipation. Standard 3/32 inch shank size fits for most electric manicure nail files machine. Great for nail art cuticle cleaning, dead skin removing, grinding, polishing and reshaping natural and acrylic gel nails. Can be used on electronic/manual grinder and electric hand drill machine, also suitable for processing wood, glass, plastic, metal, stone, ceramic tile, ceramics, etc. Suitable for professional manicurist salon or personal manicure pedicure DIY.