Check the listing for details. 4.00mm Cone Bit - WILSON White Ceramic Drill Bits US SELLER. Condition: New. Listed at 9.67 USD. Factory Outlet – the ONLY designated shop! All rights reserved! This is a cone shaped bit with a flat top like a barrel bit. Perfect for the under nail cutter and the surface work, it's also used for a backfill cutting because of the small circumference at the top.Flute Size: Φ4.00mmOverall Length: 38.1mmShank Size: 3/32" (2.34mm)Material: Zirconia CeramicADVANTAGES: 1. Antibacterial; 2. No clogging; 3. Corrosion resistant - no rust; 4. Heat resistant - prevent the overheating damage; 5. Excellent durability and cutting performance. NOTES: 1. Check nail drill bits before use; 2. Always wear eye-protective safety glasses; 3. For professional use only; 4. Do not use if it is dropped; 5. Keep out of reach of children; 6. Disinfect nail drill bits after use. Shipping Cost & Speed: IShip from Chicago warehouse within 5-7 business days