Kraft Tool RO5321-3/8X1/2 W. Rose Concave Jointer, 3/8 x 1/2-Inch Special heat tempering process for hardness and long wear Hand polished for a perfectly smooth joint Creates a beaded protruding joint very weathertight 3/8-inch by 1/2-inch Sold in cartons of 12 proudly made in the U.S.A.