Bit STAHLBERG 1/4", 25 mm made by precision forging - increased strength by up to 20% (compared to machining) from quality CrV steel S2 hardened up to 61 - 62 HRC packed in 10 pieces in a plastic box STAHLBERG is a manufacturer of professional screw bits and bits with many years of experience in the field, with customers all over the world the latest technologies, the best known materials and surface treatments are used in the production of the bits and adapters we offer