Due to popular demand, Spear Gods now carries 7.5mm American spear shafts manufactured by M85 manufacturing (formerly Spearcrafters). These are the best shafts, by far, available on the market! 7.5mm is a little bit smaller than your normal 5/16" shaft so it travels through the water faster. It's a little bigger than 9/32" shafts so it's a little more rugged. The perfect balance between size and strength!