Mom's Lock is an unlockable trinket added in The Binding of Isaac: Repentance.
- Has a chance to grant the effects of a random passive Mom item each room.
- The trinket can't give the effect of Mom's Coin Purse or Mom's Purse.
- The trinket can give the effect of a Mom item Isaac already has.
- Mom's Lock doesn't count towards Yes Mother?, no matter the effect.
- Items with the lower item quality are more favored when Mom's Lock chooses an item.
- The items chosen by the trinket won't grant health or spawn pickups/consumables.