Safco® PlanHold/Print-Lock™ 30" Hanging Clamps (six/box) The Safco Alvin Planhold Hanging Clamps-30In are high quality and heavy duty. The aluminum and chrome plated alloy construction makes for a product that is visually pleasing and made to last. With a 100 sheet or 20 pound capacity they are strong enough for whatever job you need them for and are as easy to use as they are strong. They are frustration free and will not lock or jam in those moments when you need them to work. They are also guaranteed for quality thanks to a 10 year warranty on each clip as a whole and a lifetime guarantee on the clamp's wing knobs. They are completely compatible with other products from the manufacturer and deliver nothing but the best of what you need. Never worry that you won't have enough either. They are packed six per carton to make sure you always have one on hand.