Tama HP600DTW Iron Cobra 600 Duo Glide Double Bass Drum PedalDuo Glide cam lets you easily switch between Power Glide and Rolling Glide cams Double chain drive delivers smooth and accurate motion Newly designed hinge gives you more precise motion and increased durability Speedo Ring eliminates friction by replacing traditional nylon rocker cam ParaClamp helps keep pedal flat on the floor Spring Tight keeps spring from twisting