You can only do 10 sheets at a time. For a 50-page document, that is five pulls of the handle. Because the P50 is small, you can do this while watching TV or listening to a podcast. It takes about 90 seconds.
9/10 (Deducted 1 point for being discontinued and the slow punch speed). If you see one at a garage sale for under $30, do not walk—run. gbc proclick p50
Unlike cheap plastic combs or bulky wire closers, the P50 uses a with a specific gear ratio. You can only do 10 sheets at a time