The Round Rider features a traditional and gently rounded cushion shape that is very popular due to its versatility. The seat features lower profile PVC seams that facilitate smooth leg motion, and a dimple on the bottom of the seat cushion provides soft but solid support that allows drummers to play at their best. 1st Chair's height adjustment system which blend threaded rod throne with the T-bolt system offers easy and fast height adjustment. TAMA's "Rocklok" features a specially designed Nylon Bushing at the bottom of the throne's threaded rod that prevents side-to-side motion within the base. This special feature provides exceptional durability and stability.