Crankshaft keys (also called woodruff keys) are semicircular shaped, removable keys that fit into matching keyways cut into the crankshaft leaving protruding tabs. These tabs mate with matching slots on the harmonic balancer flush upon the shaft. It is impossible for them to roll over in the seat which in turn helps guide the harmonic balancer and prevents the harmonic balancer from freely rotating about the shaft.
20R, 22R/RE Three Required
2RZ Two Required
3RZ Two Required
4AG One Required
3VZ One Required
5VZ One Required
This part is sold as each that means one. If you're working on the 20R, 22RE, 22RET order three.
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