Specifications: Material: Body adopt with 304 Premium Stainless Steel and handle is made of Sturdy Plastic, durable, anti-slipped, and easy to use. Dimension: The colossal foot rasp: 26.9cm x 7.1cm The dual sided foot file: 22.8cm x 3.5cm How to use: Step 1: Soak your feet in warm water for more than 10 mins. Step 2: Use the convex face of colossal foot rasp to scrape off the thick callus carefully. Step 3: Use the double sided foot file to smooth skin which will make your feet feel more soft and comfortable. Step 4: Clean the dead skin shaving and put foot care cream. Warming tips: It\'s not a toy, so children which is under aged 8 should use it under the guardianship of adults.