From the world manufacturer STAHLBERG with many years of experience using the latest technologies. The bit is made by precision forging (increases strength by up to 20% compared to machined ones) from chrome vanadium steel S2 (excellent in toughness), hardened to 61-62 HRC. Thanks to the pressed plate, you screw the surface of the screw head approx. 0.7 mm below the surface of the plasterboard. Packed in a practical closable case of 2 pcs.