Casstrom No.10 Survival Sheath with Fire Striker holder. 5mm diameter rod fits). This sheath fits the second generation of Casstrom No.10 knives which is the current model being sold now. The sheath is also compatible with the old version of the knife however for an exact replacement please choose model 33011. Package Contents: Casstrom No.10 Survival Sheath Casstrom 13011: No.10 Survival Sheath with Fire Striker holder