This is a Buck 866BKX, a rare Buck variation on the popular 870 Bones model. It is new and unused in box.

* Model: 0866BKX
* Condition: New
* Made in China
* Closed Length: 4 1/2"
* Blade: 3 1/2" long black 420HC; Linerlock; original factory edge, sharp!
* Handle: Black anodized aluminum with stainless liners
* Covered by Buck's "Forever Warranty"