Excellent SUPER LONG series ideal for those difficult jobs needing longer shaft sizes! SP Spanners are precisely machined,heat treated and tested under the strictest quality control measures to ensure world class quality and durability. Dual Flat Drive technology on box end to maximize contact. on fasteners Chrome vanadium steel for high durability(CRV). Tough triple chrome finish to protect tool in harsh working environments. Zero DEG offset box end and open ends for improved access. High polish finish to provide easy cleanup.