The ACESA socket manufacturing process is based on the principles of quality, resitance, sturdiness and functionality. • Wide, comprehensive range of sockets and accessories, with over 550 part numbers. • Manufactured in chrome vanadium, the best material for socket production. • Hardnesses of between HRC 44 and 48 (40-46 for 1"), and optimum hardness-strength ratio. • Made according to UNE 16501, 16503-1, 16507-1 and ISO 1171-1, 1174-1, 2725-1 standards. • Sets come in plastic or metal box. • The New Professional Profile (NPP) for ACESA socket wrenches redistributes forces and tension on to the flats of the nuts, thereby preventing damage and wear to the hexagonal edges of nuts and screws. Moreover, because the force is applied to the flats of the nut, this profile even enables work with nuts that have already been rounded. • The NPP profile allows for a significant reduction in the external thickness of sockets, thereby increasing wrench access in tight situations.