The Create-An-Album Binder Punch is designed to work with our Binder Mechanisms (sold separately). The distance between the 2-holes is 2.75 inches. The unit is made from metal and is precise and easy to use with little force. It has an anti-slide base and self-locking feature for easy storage and safety. Unit Size is 4.75×3.625×1.75 inches (closed). The hole size is .25 inches.