Caterpillar-style premium aftermarket tooth retainer or locking component. Part reference 6I6609. Size/application: J600 Retainer. Matching tooth-system size: J600. Matching pin reference: 6I6608. 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.