Double bass drum pedal, 52 series.Double chain over sprocket drive. Steel with anti-skid rubber pad.Two anchor spikes to hold the pedal in place and side-operating clamp mechanism. 4-way beater (felt-plastic). Adjustable beater angle and spring tension, 540° adjustable tilter. Drive shaft, tuning key, Allen key, memory lock on beater and additional spring pack to separate into 2 single pedals