Wera 056157 8055 6th bit check extra hard for soft joint wood fastening these torsion bits extend bit life over standard bits and prevent cam out torsion extra hard bits feature a torsion zone which extends bit life over standard bits and come with the original rapidaptor holder boasting the unique auto bit lock system for one hand bit changes and a rotating sleeve for easy steadying standard 14in hexagon drive th torsion extra hard bits are a hard wearing great value bits with longer service