An innovative way to set out dry bonds and accurately calculate brick quantities, designed specifically to aid professional bricklayers. Unique blade design with four blade scales to calculate brick and block quantities and course heights along with a conventional metric scale. Tough, high-vis, ergonomic case with rubber grip pad. Easy to operate positive lock minimising blade slip. Snap-in quick-release belt holster. Bump stop and reinforcement plate. Triple riveted, self-zeroing end-hook. Polyester coated carbon steel blade.