The Black Diamond 10 PK 9mm Snap Knife Blades 13 PT includes 10 replacement blades made from high carbon steel for crisp, reliable cutting performance. Designed for 9mm snap knives, each blade features multiple snap-off points so you can refresh to a sharp edge quickly and keep work moving. A practical refill pack for detail cutting, trimming, and everyday utility tasks in the shop or on the jobsite.