Double-Chain Drive System? – Double bass pedal made of dual chain and wider bottom plate, make it more strong and sturdy. Ensures long lasting durability. Adjustable beater angle? – The beater angle made of high density felt and metal rod. Doulbe bass drum pedals with 2 Way Beater, Easily bring you a full, powerful hitting performance experience. Adjustable spring tension? – The drum pedal width between both drum pedals can adjust to 13.8inch-21.2inch. Come with drum keys, you can adjust the tension through the spring to suit your playing style. Non slip Design? -There is a non-slip rubber pad at the bottom, which can increase the friction and prevent the pedal from sliding. This was easy to set up and works great. Just attach the rod to both pedals and tighten the screws, done! Suitable for? – Suitable for more drummers, jazz drums and electronic drum lovers to practice drum pedals. Improve your playing skills effectively. Stable double chain drive. Suitable for all styles of music. Non-slip double drum pedal design. Doulbe drum pedals provide power, speed and control. Non-slip design, perfect for more drummers, drum jazz and electronic drum enthusiasts to practice drum pedals. The width between both drum pedals can adjust to 12.2inch-20.47inch. You can adjust the tension through the spring to suit your playing style.