Spark R&D Spark Pucks Black, Unisex, One size Oversize aluminum center disc overlaps binding channels for maximum strength and rigidity Bindings slide on soft, nylon material for effortless installation (+/ -) quarter inch (6.5mm) of toe/heel adjustment allows for perfect centering (+/ -) 30 degree angle adjustments; infinite stance width and setback adjustments Works with all Tesla and Tesla T1, as well as Blaze & Burner bindings