Wilson Jones 344 Line Casebound 3 Ring Binder with DubLock Ring, 2-Inch Capacity, 11 x 17 Inches Sheet Size, Black (W344-90) DublLock round ring mechanism. 2-inch capacity has room for 375 sheets 3 heavy duty, locking round rings Black DublLock round ring mechanism. 2-inch capacity has room for 375 sheets 3 heavy duty, locking round rings Color: Black