No punching, stapling or tearing! Extruded aluminum clamps open to 1in. and hold up to 100 sheets. 20 lb. maximum weight. Use with the pivot or drop/lift wall racks and the mobile stand or mobile plan center (sold separately). Recyclable. GREENGUARD(R) certified for healthier indoor air quality. Manufactured with reduced harsh chemicals and with processes that are 'low VOC' (low in volatile organic compounds). Safco(R) Hanging Clamps, 30in. Long, Pack Of 6 is one of many Board Accessories available through Office Depot. Made by Safco.