3 Ring Punchless Binders

Adding a third point stops an unpunched block skewing as it thickens, which is the limit of the two ring version. Everything else about the trade-off holds: originals stay intact, capacity is lower than a comparable ring binder, and pages are less secure if the file travels. Right for signed and legal papers. See punchless binders, 2 ring punchless binders and binders.