Dental Nail Tungsten Steel Grinding Head Exfoliating Tool $ 5.22 Product information: Material: Tungsten steel Shank diameter: 2.35mm (mm) Scope of application: nail art/dental/technician/jade/walnut carving, etc. Specifications: HP55, HP56, HP57, HP58, HP59, HP60, HP61, HP62, HP63 Packing List Sanding head*1