Electric hammer drills we manufature are made of 40Cr tipped with hard metal (YG8) and get good heat treatment as well as surface treatment. Main technical conditions of masonry drill: Manufacturing process: milled Point angle: 130º Flute type: double flutes, spiral flutes Material: 40Cr, YG8 Finish: sandblasted, Cr-plated, Zine-plated, Ni-plated Shank: SDS-plus, SDS-max, Hex, Taper, etc Diameter: 6-40mm Higred tools group can provide different kinds of electric hammer drills meeting various standards. For special sizes, available upon request