The HFS (R) Precision Micrometer Holder Stand Base is a reliable and durable tool for accurate measuring and stability. Made of cast iron, it comes with a rubber pad clamp for secure and safe use. The fixture can accommodate up to 18mm of opening distance and weighs approximately 1.98LBS. It can be conveniently adjusted to any angle direction by a knob, providing the ideal measuring position and angle for inside and outside micrometers. The surface of the fixture is equipped with a soft rubber pad to protect the instrument from damage during clamping. This micrometer holder stand base is perfect for clamping 0-4" micrometers to ensure precise and stable measurements.