This set of spanners are designed to provide optimum support. The spanners are forged with high grade Chrome Vanadium Steel which is hardened and tempered for improved rigidity. They offer superior grip on various kinds of nuts and bolts. Its anti-slip jaws helps the user in fastening or loosening various sizes of nuts and bolts without slipping. They have deep heads which enable the user to easily access any bolt. Its excellent grip provide comfortable hand support and excellent grip for instant and efficient fastening mechanism. The spanners are made with high density metal. They are ergonomically designed for heavy duty use. The open end heads have machined jaws for efficient and easy operation. They are ideal for professional and DIY applications. The spanners are in sizes as mentioned: 6x7, 8x9, 10x11, 12x13, 14x15, 16x17, 18x19, 20x22, 21x23, 24x27.