Caterpillar-style premium aftermarket tooth retainer or locking component. Part reference 220-9090. Size/application: K80, K90, K100 Drive Through Retainer. Matching tooth-system size: K Series K80. Matching pin reference depends on the installed system generation and is not separately identified in this catalog. Secures the replaceable tooth, protector or ripper component to its matching adapter. Brand compatibility: Caterpillar and premium aftermarket systems built to the matching Caterpillar specification. This hardware fits only the specified system and matching dimensions.