To drive a staple, light contact against a sensor located right behind the tool's nose, is all you need. Simply sliding the item to be fastened into the area between the anvil and the nose of the tool allows an easy push against a fixed sensor switch and the triggering process is done. Safe, simple and speedy. That is what the Omer ROC system made available to a variety of staple series (3G, 26, 64, 62, 80, 50, 65, 40, 4097 and SJK) brings to the... job every day. Fine craftsmanship of the kind that Omer has been known for since 1972, ensures great performance and long life. NOTE: The "C" in our ROC system tools stands for CONTACT, meaning that the tool fires when sensor comes in CONTACT with the material you insert. The pedal in this case having the only fuction of an additional safety.