These items share the case's "Rare Special" probability pool. Each case opening has approximately a 0.26% chance to drop one of these.
★ Bayonet Covert 
★ Bayonet | Fade Covert 
★ Bayonet | Slaughter Covert 
★ Bayonet | Case Hardened Covert 
★ Bayonet | Night Covert 
★ Bayonet | Blue Steel Covert 
★ Bayonet | Crimson Web Covert 
★ Bayonet | Stained Covert 
★ Bayonet | Scorched Covert 
★ Bayonet | Safari Mesh Covert 
★ Bayonet | Boreal Forest Covert 
★ Bayonet | Urban Masked Covert 
★ Bayonet | Forest DDPAT Covert 
★ Flip Knife Covert 
★ Flip Knife | Fade Covert 
★ Flip Knife | Slaughter Covert 
★ Flip Knife | Case Hardened Covert 
★ Flip Knife | Night Covert 
★ Flip Knife | Blue Steel Covert 
★ Flip Knife | Crimson Web Covert 
★ Flip Knife | Stained Covert 
★ Flip Knife | Scorched Covert 
★ Flip Knife | Safari Mesh Covert 
★ Flip Knife | Boreal Forest Covert 
★ Flip Knife | Urban Masked Covert 
★ Flip Knife | Forest DDPAT Covert 
★ Gut Knife Covert 
★ Gut Knife | Fade Covert 
★ Gut Knife | Slaughter Covert 
★ Gut Knife | Case Hardened Covert 
★ Gut Knife | Night Covert 
★ Gut Knife | Blue Steel Covert 
★ Gut Knife | Crimson Web Covert 
★ Gut Knife | Stained Covert 
★ Gut Knife | Scorched Covert 
★ Gut Knife | Safari Mesh Covert 
★ Gut Knife | Boreal Forest Covert 
★ Gut Knife | Urban Masked Covert 
★ Gut Knife | Forest DDPAT Covert 
★ Karambit Covert 
★ Karambit | Fade Covert 
★ Karambit | Slaughter Covert 
★ Karambit | Case Hardened Covert 
★ Karambit | Night Covert 
★ Karambit | Blue Steel Covert 
★ Karambit | Crimson Web Covert 
★ Karambit | Stained Covert 
★ Karambit | Scorched Covert 
★ Karambit | Safari Mesh Covert 
★ Karambit | Boreal Forest Covert 
★ Karambit | Urban Masked Covert 
★ Karambit | Forest DDPAT Covert 
★ M9 Bayonet Covert 
★ M9 Bayonet | Fade Covert 
★ M9 Bayonet | Slaughter Covert 
★ M9 Bayonet | Case Hardened Covert 
★ M9 Bayonet | Night Covert 
★ M9 Bayonet | Blue Steel Covert 
★ M9 Bayonet | Crimson Web Covert 
★ M9 Bayonet | Stained Covert 
★ M9 Bayonet | Scorched Covert 
★ M9 Bayonet | Safari Mesh Covert 
★ M9 Bayonet | Boreal Forest Covert 
★ M9 Bayonet | Urban Masked Covert 
★ M9 Bayonet | Forest DDPAT Covert All 13 standard items in this case, grouped by rarity. Drop rates per Valve's official probability disclosure.
To open the Winter Offensive Weapon Case, you need one Winter Offensive Weapon Case (free in-game drop or from the Steam Community Market) plus one CS2/CS:GO Case Key, which costs $2.49 USD on the Steam Marketplace. Right-click the case in your inventory and select "Open Container."
Drop rates per Valve's mandatory probability disclosure: Mil-Spec Grade ~79.92%, Restricted ~15.98%, Classified ~3.20%, Covert ~0.64%, Rare Special (★ Bayonet, ★ Bayonet | Fade, ★ Bayonet | Slaughter, ...) ~0.26%. Each drop also has roughly a 10% chance to be StatTrak™ on eligible skins.
The Winter Offensive Weapon Case rare special pool contains 65 items: ★ Bayonet, ★ Bayonet | Fade, ★ Bayonet | Slaughter, ★ Bayonet | Case Hardened, ★ Bayonet | Night, ★ Bayonet | Blue Steel, ★ Bayonet | Crimson Web, ★ Bayonet | Stained, ★ Bayonet | Scorched, ★ Bayonet | Safari Mesh, ★ Bayonet | Boreal Forest, ★ Bayonet | Urban Masked, ★ Bayonet | Forest DDPAT, ★ Flip Knife, ★ Flip Knife | Fade, ★ Flip Knife | Slaughter, ★ Flip Knife | Case Hardened, ★ Flip Knife | Night, ★ Flip Knife | Blue Steel, ★ Flip Knife | Crimson Web, ★ Flip Knife | Stained, ★ Flip Knife | Scorched, ★ Flip Knife | Safari Mesh, ★ Flip Knife | Boreal Forest, ★ Flip Knife | Urban Masked, ★ Flip Knife | Forest DDPAT, ★ Gut Knife, ★ Gut Knife | Fade, ★ Gut Knife | Slaughter, ★ Gut Knife | Case Hardened, ★ Gut Knife | Night, ★ Gut Knife | Blue Steel, ★ Gut Knife | Crimson Web, ★ Gut Knife | Stained, ★ Gut Knife | Scorched, ★ Gut Knife | Safari Mesh, ★ Gut Knife | Boreal Forest, ★ Gut Knife | Urban Masked, ★ Gut Knife | Forest DDPAT, ★ Karambit, ★ Karambit | Fade, ★ Karambit | Slaughter, ★ Karambit | Case Hardened, ★ Karambit | Night, ★ Karambit | Blue Steel, ★ Karambit | Crimson Web, ★ Karambit | Stained, ★ Karambit | Scorched, ★ Karambit | Safari Mesh, ★ Karambit | Boreal Forest, ★ Karambit | Urban Masked, ★ Karambit | Forest DDPAT, ★ M9 Bayonet, ★ M9 Bayonet | Fade, ★ M9 Bayonet | Slaughter, ★ M9 Bayonet | Case Hardened, ★ M9 Bayonet | Night, ★ M9 Bayonet | Blue Steel, ★ M9 Bayonet | Crimson Web, ★ M9 Bayonet | Stained, ★ M9 Bayonet | Scorched, ★ M9 Bayonet | Safari Mesh, ★ M9 Bayonet | Boreal Forest, ★ M9 Bayonet | Urban Masked, ★ M9 Bayonet | Forest DDPAT. The combined drop probability for any item from this pool is approximately 0.26% per case opening.
