1. Adjustable hole saw size: 0-14 mm. 2. Material: Durable hard steel and aluminum alloy. 3. Anti-slip designed handle and optimally shaped drill bit for comfortable grip and easy operation. 4. Excellent hand tool that is also ideal for electricians, plumbers and heating engineers, carpenters, etc. 5. Uses high-strength alloy steel material to reduce wear and distortion. Description: The item is a universal and practical hole opening reamer tool which is mainly made of durable high-strength alloy steel material to reduce wear and distortion, and can be used to drill holes with a diameter of 0-14mm on your RC helicopter or car. Features: 1. Color: Black. 2. Material: Durable hard steel and aluminum alloy. 3. Size(Diameter): Approx. 0-14mm. 4. High Quality Expanding Opening Hole Reamers Drill Tool Universal 0-14mm 5.For RC car and helicopter can be used. 6. Uses high strength alloy steel material to reduce wear and distortion. 7. Bore diameter indicator for easy operation. , 8.Including an aluminum alloy safety lock. 9. CNC aluminum alloy handle with built-in tray for accessories and screws. Package Included: 1 * Universal Expansion Hole Opener Reamer Drilling Tool Delivery quantity: 1 piece Product color: black Product size: 13 cm long Note: Manual measurement, please allow an error of 1 - 3 cm!