Aço carbono Para apertar ou afrouxar porcas, parafusos e dispositivos diversos Kit de chave combina com 26 peças ( 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30 e 32 mm)