Lufkin 656N Brick Mason's Wood Folding Rule, 6'Used by bricklayers for spacing brick courses. Spacing range 2 7 8" to 3 1 2" in 1 16ths increments. Brick spacings identified by black letters A K. Rule is printed in yellow. Regular outside markings in black. Brick Masons scale on inside, red course counter numbered consecutively. Highlights: Wood Brick mason's For over sized brick Width x Length: 5 8" x 6' Carded