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Flat Penny trinket
Flat Penny is a trinket in The Binding of Isaac.
Description
Grants a chance to drop a key when collecting coins.
The chance is based on the coin's worth:
• 
Penny: 25% chance.
• 
Double Penny: 43.75% chance.
• 
Nickel: 76.27% chance.
• 
Dime: 94.37% chance.
Keys can be of any type.
Can be dropped from Special Shopkeepers.
Note
This page shows the latest information as of the new Repentance+ (Online Co-op) DLC.
To see information about this trinket for the previous Repentance version, check this page instead.
Item pools
Flat Penny can be found in the following item pools:
| Name | Weight |
|---|
Special synergies
The following special synergies and interactions for Flat Penny have been documented.
| Mod | Item | Synergy |
|---|---|---|
| --- | Trinket multipliers | Boosts the chances by +25% per multiplier. |
* Note that not all possible synergies and interactions are listed here.
Internal item description
Below is the Internal Item Description as shown in-game.
Note that some stat changes are not displayed here. Please see the main description for the full effects.
Flat Penny
• 25% chance to spawn a key each time you pick up a coin
• Golden Trinket (without Mom's Box): 50% chance to spawn a key each time you pick up a coin
• Mom's Box: 50% chance to spawn a key each time you pick up a coin
• Mom's Box + Golden Trinket: 75% chance to spawn a key each time you pick up a coin
• Chance is increased with nickels and dimes
External links
- Check out the trinket description on the external Isaac Wiki.
A Missing Page 
Bloody Penny 
Burnt Penny 
Counterfeit Penny 
Tick 
Isaac's Head