The Moore & Wright 891M Adjustable Depth Micrometer is a precision measuring instrument designed for accurate depth measurement in engineering and metalworking applications. This metric micrometer features a fixed depth rod with a 6.5mm diameter, providing reliable measurements from 0 to 25mm with 0.01mm graduation for exceptional accuracy in professional workshops and inspection environments. Built to conform to BS 6468:1984, this depth micrometer demonstrates adherence to recognised British Standards for quality and precision. The tool is fitted with a speeder-type ratchet mechanism that enables rapid positioning whilst maintaining consistent measuring pressure, ensuring repeatable results across multiple measurements. A lock screw is incorporated to secure measurements once taken, preventing accidental adjustment during recording or inspection processes. The 63.5mm (2.1/2in) base length provides stable support against the reference surface, making this micrometer particularly suitab