Check the listing for details. 1/2" x 5/8" Concave Jointer - RO5321-1/2X5/8. Condition: New. Listed at 18.95 USD. Use this tool to make a protruding beaded masonry joints. Creates a consistent convex joint every time for a watertight seal popular in historical restoration. Each end makes a difference size joint for versatility. One end makes a 1/2" joint, then flip it around for a 5/8" 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. Proudly made in the USA.Strong carbon steel bladeHeat tempered for hardnessHand polished for a perfect jointCreates a convex, beaded jointForms 1/2 In. and 5/8In. joints with one toolCreates a water tight seal in mortarDesigned for knuckle clearancePopular in historical restorationOverall length 10-1/2 In.Made in the USA