Alliance Olympic Mark 1N World Athletics Approved Starting BlockOLYMPIC MARK1N STARTING BLOCK Want to achieve that explosive start in your competitions? Then check out the Olympic Mark1N Starting Block! Approved by the World Athletics, this block is made from a heavy slotted aluminium channel centre rail with ribs to slip in anchor plates, offering better ground stability and a strong sense of safety when pushing off. The extra broad paddles include 5 different angle adjustments and it comes with 3 grass spikes