These items share the case's "Rare Special" probability pool. Each case opening has approximately a 0.26% chance to drop one of these.
★ Butterfly Knife Covert 
★ Butterfly Knife | Fade Covert 
★ Butterfly Knife | Crimson Web Covert 
★ Butterfly Knife | Slaughter Covert 
★ Butterfly Knife | Case Hardened Covert 
★ Butterfly Knife | Urban Masked Covert 
★ Butterfly Knife | Blue Steel Covert 
★ Butterfly Knife | Night Covert 
★ Butterfly Knife | Stained Covert 
★ Butterfly Knife | Forest DDPAT Covert 
★ Butterfly Knife | Boreal Forest Covert 
★ Butterfly Knife | Scorched Covert 
★ Butterfly Knife | Safari Mesh Covert All 14 standard items in this case, grouped by rarity. Drop rates per Valve's official probability disclosure.
To open the Operation Breakout Weapon Case, you need one Operation Breakout 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 (★ Butterfly Knife, ★ Butterfly Knife | Fade, ★ Butterfly Knife | Crimson Web, ...) ~0.26%. Each drop also has roughly a 10% chance to be StatTrak™ on eligible skins.
The Operation Breakout Weapon Case rare special pool contains 13 items: ★ Butterfly Knife, ★ Butterfly Knife | Fade, ★ Butterfly Knife | Crimson Web, ★ Butterfly Knife | Slaughter, ★ Butterfly Knife | Case Hardened, ★ Butterfly Knife | Urban Masked, ★ Butterfly Knife | Blue Steel, ★ Butterfly Knife | Night, ★ Butterfly Knife | Stained, ★ Butterfly Knife | Forest DDPAT, ★ Butterfly Knife | Boreal Forest, ★ Butterfly Knife | Scorched, ★ Butterfly Knife | Safari Mesh. The combined drop probability for any item from this pool is approximately 0.26% per case opening.
