... ,W9(9341),4341,4241,etc;4)Treatment:Ti coating,fully ground,milled,black,etc5)Concrete Using:drilling in steel,wood,concrete ... ,...etc6)Any other information you want to know. HSS Step Drill ,Two Flute Metric,Size for all standard machine tables .Safety ... the table.size :4-10 to 6-32 . HSS Step Drill With Interchan-Geable Center Bits,3 Flute or 4 Flute ...