The P50 features a convenient closing mechanism. While ProClick spines can be closed by hand (zipping them shut), the P50 has a ridge that helps guide the spine closed smoothly, ensuring the "zip" is tight and secure.
Unlike cheap plastic combs or bulky wire closers, the P50 uses a with a specific gear ratio.
Weighing less than two pounds, the P50 looks like a heavy-duty hole puncher you might use for three-hole paper, but it is actually a . It punches an 8.5" x 11" sheet of paper with a specific pattern of rectangular holes (usually 32 holes per letter sheet) that align with the 3:1 pitch ProClick spines.
You place your clear PVC cover or cardstock back cover into the P50. Align it with the paper guide (which is adjustable). Squeeze the handle. The punch goes through the plastic like butter.