Pearl's ICON Series are the gold standard for drum racks. Its patented square aluminum tubing allows clamps to hold without turning or sliding for ultimate stability and each section is independently height adjustable. Pearl's clamps feature high-strength die cast construction and hinged quick release jaws for fast set up and tear down. Expansion kits are also available with straight or curved tubes for customized setups. These curved expansion bars are ideal for expanding your DR501, DR501C, DR503, or DR503C Icon Drum Rack.