The M&W Vernier Caliper Standard 300mm is a precision measuring instrument featuring four-way measurement capability (inner diameter, outer diameter, depth, and step measurement) with a monoblock solid slider design for accuracy and durability. The hardened stainless steel construction with chrome-plated scale and laser-engraved graduations displays measurements in both millimetres and inches, with a 0.05mm resolution for detailed work. Ideal for electricians, engineers, machinists, and trade professionals who require reliable dimensional measurement in installation, maintenance, and quality control applications.