The new Crompton dori block is designed for 50.8mm bricklayers’ profiles, crafted from durable engineer-grade plastic. It allows you to run the string line both ways around a 90-degree corner with ease. Featuring two tie wraps at the back for secure line attachment and a small V on top for clear visibility of brick gauge lines. One arm is extended to offer a precise reference point for the brick, and its reversible design works on both ends. A metal screw and threaded inserts on both sides enable accurate height adjustments. Developed in the UK by experienced bricklayer Stu Crompton.