Description : Professional Nail Drill Bits Set : Come with 5 different styles bits , suitable for polishing , sharping , grinding , nesting , carving , smoothing , remodeling gel and acrylic nails . Materials : tungsten steel ; Safety , durable , easy to use . Creating less dust with little friction and heat . Shank Diameter : 2 . 35mm ( 3 / 32 inch ); Fits on electronic grinder , hand grinder and electric drill . Helping to polish and reshape your natural and acrylic nails . Perfect tools for professional salon or home nail art DIY . Length : 5 cm / 1 . 97 inches Package Includes : 5Pcs Rotary Files