Oregon 541655 Sharpener/Chain/Bar Kit, 16"Highlights: Length: 16" Easy to use Precision sharpening system that gives chain saw users the power to sharpen their own chain in a matter of seconds with a simple attachment From dull to sharp in seconds Easier cutting, bar mount sharpener is lightweight, durable, & highly visible Exact alignment between cutter & honing surface for perfect angles & knife sharp edges Crescent shaped sharpening stone Powersharp 16" guide bar and bar mounted sharpener