★ Butterfly Knife
The ★ Butterfly Knife is a Covert custom balisong obtained from the Operation Breakout Weapon Case. Valve notes that the freely pivoting blade enables rapid deployment or concealment through a fan-like opening motion, and that such knives are outlawed in multiple countries due to this capability. The knife's iconic opening animation is its most recognizable feature in CS2. StatTrak versions are available. The dual-handle construction creates a distinctive silhouette that no other knife model in the game replicates.
Cheapest wear we have on this page. Pattern / float overpay is extra.
Operation Breakout Weapon Case: (case+key) ÷ drop chance. Average, not a promise.
Covert / missing collection peers: no contract estimate.
Price History & Performance
Price by Wear
Cases & Drop Odds for ★ Butterfly Knife
Probability of unboxing this skin per single case open, expected number of opens until you get one, and the case's expected return based on the current market value of every skin inside.
| Case | Drop Chance | Expected Opens | Open Cost | Market EV | EV vs Cost |
|---|---|---|---|---|---|
 Operation Breakout Weapon Case | 0.0200% | 5,000 | $14.00 | $0.65 | -95.4% |
Drop chance = official rarity odds ÷ size of that rarity pool inside the case. Market EV is the probability-weighted average of every skin's lowest current listing. "EV vs Cost" compares that EV against the case + key price — negative means opening loses money on average.
Where to Buy ★ Butterfly Knife
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