Hensley-style premium aftermarket tooth retainer or locking component. Part reference K156S. Size/application: Pin X156 Tooth. Matching tooth-system size: Hensley X156. 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: Hensley and premium aftermarket systems built to the matching Hensley specification. This hardware fits only the specified system and matching dimensions.