Hanging clamps package of 6 - the hanging clamps ship for free within continental USA. Economical solution for hanging clamps to hold drawings and blueprints in blueprint and racks and stands. Available in 18", 24", 30", 36", and 42" sizes fits all Mayline, Planhold, and Safco blue print racks and blueprint stands. The Brookside Design hanging clamps are made of extruded anodized aluminum. Each hanging clamps will hold up to 100 sheets securely without punching or stapling.