50631 Manabloc wrench for Manabloc compression connections and ideal Viega Manabloc 50631 wrench replacement.  This wrench provides a combination of 2 wrenches for installation (tightening or loosening) of 3/8" and 1/2" lock nuts for compression style Manabloc and Minibloc manifolds.  
**Please note this wrench is not metal and not as hard as metal, but is made of strong, light, but durable polycarbonate ABS plastic.  If your Manabloc nuts are stuck or you intend to tighten the nuts beyond manufacturer recommendations, then we recommend you pursue the original metal wrench.