The Major Tech Digital Caliper 150mm is a precision measurement tool designed for electricians, engineers, and trade professionals who need accurate dimensional readings on the job site. It features dual-unit display (mm/inches), zero adjustment, and a resolution of 0.01mm or 0.0005", making it ideal for panel building, cable routing, component spacing, and general installation work. Powered by a 1.5V silver oxide battery, this caliper is compact at 180mm × 86mm × 25mm, fitting easily into a tool pouch.