Electric Hammer Drill Bits 40cr,YG8c, chrome plated Length: 280mm, 400mm, 500mm, 600mm, 700mm, 800mm Professional quality 40cr,YG8c, chrome platedLength: 280mm, 400mm, 500mm, 600mm, 700mm, 800mmSuitable for used in drilling on marble, concrete and granite etc.Diameter: 10-40mmIf you are interested in it, please enquire us for more information. Good quality Electric Hammer Drill