Tama HP900PSWN, Power Glide System, Double Bass Drum Pedal, The Power Glide features a double-chained offset cam which increases power and speed as the beater reaches the end of the stroke, new bearing Housing, Cobra Coil, Speedo-Ring, Oiles® bearing Hinge, Vari-Pitch Beater Holder, Felt Iron Cobra Beater, included Carrying Cases