Stahlwille603758 50 8 03010008 Hex Head Bits 8 mm 1/2" (12.5 mm) - Stahlwille 03010018, Design according to DIN 3124 and ISO 2725-1. Manufactured from hpq ® high-performance steel, chrome-plated surface. Stahlwille 50 18 03010018 Hex Head Bits 18 mm 1/2" (12.5 mm)