I purchased this item this spring and have been storing it unused. Please feel free to use it. Here's a description of the bit: ---------------------------------- This bit is used to push up cuticles and remove dead skin. It eliminates the need for the pushing step with a pusher and is suitable for removing calluses. A versatile nail bit! *Can be used with machines like LABO and URAWA. Bit shaft: 2.3mm Recommended rotation speed: 2,3000 rpm