The Spark Canted Pucks are basically the same pucks that put Spark R&D on the market, except a slight, 3-degree canted angle makes these pucks a bit friendlier on your knees. 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.