The Onyx OD4012 electric punch is a medium-duty, open-ended punch designed with the operator in mind. Offering quick and easy setup, this punch features a patented pin retainer system that gives quick access to all die punch pins while keeping them firmly in place - any die punch pin can be easily disengaged allowing for evenly centerd punching of custom sized sheets. There are 12 standard interchangeable die patterns available including plastic coil, plastic comb, double-loop wire, and three-hole punching. These E-Z Change System dies can be swapped out quickly, allowing the operator to easily change from job to job, reducing downtime. Other user friendly features of the OD4012 include pre-set paper stop positions, foot pedal operation (versa and palm switches optional), and both automatic and manual reverse. This unit is designed for standard sized, 11" document applications with a punching capacity rated up to 30 sheets of 20lb paper. The OD4012 is the best open-ended punch in its class, with heavyweight metal construction that promises exceptional punching power and strength.