Feature: 1. Helps remove old dead skin and calluses on the soles of the feet, and make foot skin smooth and delicate. 2. Quickly and effectively exfoliate skin, does not damage the normal skin of the foot, bring you convenience. 3. Excellent stainless steel material, the grinding head will not rust, and has good durability and cutting performance. 4. Strong hardness, high temperature resistance, corrosion resistance, long‑lasting wear resistance, easy to clean. 5. 2.35mm universal handle diameter, specially designed for most nail drill machine, easy to install. Specification: Condition: 100% Brand New Item Type: Nail Drill Bit Material: Stainless Steel Characteristics: High temperature resistance, corrosion resistance, strong hardness, long-lasting wear resistance, easy to clean. Uses: Exfoliating dead skin on the feet, manicuring, removing hangnail, exfoliating cuticles, calluses, etc.Size Chart:Model Handle Length Handle Width Grinding Head Length Grinding Head Width B3F 39mm / 1.54in 2.35mm / 0.1in 22mm / 0.9in 15mm / 0.6in B3C 38mm / 1.5in 2.35mm / 0.1in 22mm / 0.9in 15mm / 0.6in. Package List: 1 x Nail Drill Bit1 x Storage Box Note: 1. Please allow slight error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.3.Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.