Use this W. Rose™ 1/4" x 3/8" Flat Slicker Jointer tool to make flat, flush masonry joints. This flat joint is popular for exteriors because it prohibits moisture from entering the joint adding stability. Due to its size and shape this is a great tool for tucking mortar into the joints as backfill or restoration. Each end makes a difference size joint for versatility. One end makes a 1/4" joint, then flip it around for a 3/8" joint. Made from formed high quality steel for durability. The jointer is then sent through a unique heat-tempering process for hardness and long wear. The steel is then polished for a smooth, perfect joint every time. The shape of the tool provides knuckle clearance as you move along the joints. The overall length of the tool is 10-1/2" long.