1/2" XZN spline bit sockets, 18-piece. For engine (cylinder head), drive shafts and rear axles. Made from drop-forged chrome vanadium steel 31 CrV 3. Insert made of injection-molded polypropylene, torsion-resistant, oil and acid-resistant, and with permanently legible markings for all wrench sizes. Consisting of: 1x each spline bit socket 55 mm long / VZ5, VZ6, VZ8, VZ10, VZ12, VZ14; 1x each spline bit socket 100 mm long / VZ6, VZ8, VZ9, VZ10, VZ12, VZ14; 1x each external 12-point socket SW 9, 10, 12, 18, 19, 21 mm. Drive type / Profile: XZN Internal Spline; Drive: 1/4"; Article type: Main color silver; Profile size: VZ5, VZ6, VZ8, VZ9, VZ10, VZ12, VZ14; Wrench size: 9 mm, 10 mm, 12 mm, 18 mm, 19 mm, 21 mm; Assortment: 18 pieces.