The Spark Pucks are Spark R&D's most popular splitboard accessory for their channel-like adjustments on boards with 4-hole inserts. With these pucks, you can adjust your binding's stance on the fly. They are compatible with any splitboard that has the industry standard 4-hole inserts, excluding the K2 Kwicker. They are not compatible with channel style splitboards, DIY splitboards, or Spark R&D's canted pucks.