Intended for the true professional to stand up to heavy daily use.Made of high carbon steel.Brick jointers have a convex face for striking concave joints.Each end is a different size for making different size joints.Tooled joints are recommended for exterior applications because the jointer compacts the mortar to keep moisture from penetrating the joint.Concave joint helps conceal small irregularities in laying and emphasises the pattern.10-.50 length.38 and .50 joint size.Length: 10.Width: 1.5.Height: 1