The triple wheel lock and level system helps to easily secure the dartboard to virtually any surface. This unique and exclusive system allows for a quick and solid fix to the wall. Each wheel can be easily adjusted to enable perfect radial alignment and levelling. The Rota lock dartboard fixing kit includes wall bracket fixing & instructions. This can be used with the Blade 4 Dual Core Blade 5 Blade 5 Dual Core and Champions Choice Dartboards.