Sturdy Cast Iron Base: The heavy duty cast iron base enhances stability and reduces shifting for prolonged use in demanding applications Advanced Gear Mechanism: Features an accurate tooth shape with adjustable diameter to fit various drill bits, providing consistent drilling for wood, and metal materials Secure Clamping Head: The robust clamping head firmly holds electric drills up to 55mm, ensuring controlled handling and minimizing accidental movement during operations Quick Setup: Simple construction allows fast assembly without additional tools, making it to change between different work environments Adjustable Positioning: Enables 0 90 degree flexible for straight or angled holes, ideal for home improvements, craft projects, and small workshop tasks, Manufacturer: ZBIianxer