12 Spikes Dimensions: 4.33 " diameter The incredible Grip Disk (TM) grabs your boot treads to prevent slippage, while still allowing your snowboard to flex naturally in all directions. Plus, it 's soft and spiky - just how you likey. TECHNOLOGIES: FLEX RING (TM) - Allows the Grip Disk (TM) to bend with your board. LIGHTWEIGHT - Minimal weight with maximum grip. SCREW GLUE - Glued on. Like it was screwed on. Crab Grab The GripDisk | Crystal (Clear) | Christy Sports