

first telltale sign: the bit cams out of screw heads more easily than normal—thuda-thuda-thuda-thuda. The other sign: the very tip is shiny, which is a means the steel has worn. Time for a new one.
first telltale sign: the bit cams out of screw heads more easily than normal—thuda-thuda-thuda-thuda. The other sign: the very tip is shiny, which is a means the steel has worn. Time for a new one.