By adding a precise interlocking shape to the end of existing reinforcement bar, the MonkeyBar provides a unique “integral-to-the-bar” mechanical coupler that saves steel by avoiding the need to overlap lengths of reinforcing bars. The MonkeyBar is available in the five bar diameters: 16mm, 20mm, 25mm, 32mm, and 40mm. Monkey Steel Pty Ltd. 612-8354-4000.