ERGONOMIC: This brick jointer set has a durable, cast aluminium, ergonomically designed handle with increased knuckle room for ease of use. 4 INTERCHANGEABLE BARRELS: It has 4 sizes of interchangeable steel barrels: 13mm (1/2"), 16mm (5/8"), 19mm (3/4") and 22mm (7/8"). STORAGE POUCH: The kit is supplied in a handy storage pouch.