Spiel Associates, Inc. offers the Sterling Punchmaster 20, reported as the fastest and most versatile punch on the market. It punches sheets from 4x5" to 20x20" anywhere on the sheet, not just on the spine. Users can punch for comb, spiral, and double loop wire as well as tabs, door hangers, and windows.
An air feeder is available, which allows for signature and heavy board punching. It also allows micrometer die adjustments, for easy sheet centering. The conveyor allows an operator to run the Punchmaster at speeds up to 125,000 sheets per hour, which translates into a million sheets per shift.