The Rite-Hite® Polymer Prop Wrench is made from a high-tensile polymer and will tighten all 1-1/16" propeller nuts without stripping. Designed for OMC motors over 40hp and Mercury® motors over 50hp. High-strength polymer construction. Tightens all 1-1/16" pop nuts. Designed for OMC motors over 40hp and Mercury motors over 50hp.