Coupler Spanner

This specially designed spanner for model boat propshaft couplers. It makes tightening lock nuts in confined or hard-to-reach spaces easier and with greater control.

Simply slide the spanner over the prop shaft and hook it over the edge of the coupler. By positioning the handle against the hull, the spanner securely holds the coupler in place, allowing you to tighten the lock nut easily with just one hand.

The Coupler shown in the picture is for reference and is not included.