An electric starter or backfiring 4-stroke engine will not loosen this Spinner Nut. Simple to install, hold the Spinner Nut with a 22 mm (7/8″) wrench and then tighten the socket set screw against the shaft. Required but not ncluded: hex wrench. Dimensions: 22 mm x length 26 mm. Weight: 25 g
Ref. 0299