Starting block, • High quality international starting system. • High quality light weight aluminium casting. • 5 pedal angle adjustments 350, 450, 550, and 650. • Easy carry center rail. • Pedals will not come of rail during transport. • Pedals have threaded spike inserts 'Easy changed outs” • Included threaded spikes for synthetic surface. • atent 5, 033, 738. • IAAF certified