OIIKI 3PCS Diamond Nail Drill Bit, Cuticle Clean Carbide Nail Rotary Burrs, Pedicure Nail Art Tools, for Electric Nail File Machine Specification Material: The nail drill bit is made of high quality stainless steel, safe and professional. Size: Ball head diameter is 1.8mm and 2.34mm Needle head size is 1.6mm * 10mm. Application The needle drill bit is used to clean the cuticle area, side walls and also for under the nail edge. The Ball drill bit is used for the cuticle area, and side walls. Package include 3PCS Diamond Nail Drill Bit in total--- Ball and Needle shaped, 3/32 shank. After Sales Service If you have anything concerned with the Diamond Nail Drill Bit after use, please first to choose contact us and we will take care of it for you.here is how Find your order in your account, click the " contact seller" button beside the order ID.