Use the Union 3D Disk to mount any regular disk binding to the classic 3D insert pattern.  Includes:  3D Disk x 2Mounting Hardware Compatibility:   Regular Disk Bindings (2016 - 2019) Product Details • Polycarbonate (Do Not Use Loc-Tite or Chemicals to Clean) • Board Compatibility: 4x4, 2x4, The Channel ...