This product is made of high carbon steel and is built with varied joint sizes on either end to provide you with the most variation on the task 

The QLT Brick Jointers are composed of carbon steel and polished to provide a smooth junction. Marshalltown Brick Jointers are made in the United States of America from global materials. The mortar was efficiently molded by the clever concave jointer between bricks, resulting in a symmetrical professional finish. It has two ends that are different diameters. One end of the jointer is 1/2" and the other is 5/8". This tool is made from a single piece of high carbon steel. It is incredibly durable and long-lasting.