4pcs combination HSS step drills set

4PCS COMBINATION STEP DRILLS SET 1.SIZE: 1PC HSS STEP DRILLS:4-12MM×5 step 1PC HSS CONICAL DRILLS:8-20MM 1PC HSS 3FLUTE COUNTERSINKS DIN335C:12.4MM 1PC HSS SAW DRILL BITS:6.0MM 2.PACKING:wooden box,metal box,plastic box or according to your requirement 3.Material:High Speed Steel 4241,4341,m2,m35,m42 4.Flute:Spiral flute 5.Shank:Straight shank,we can also supply hex shank,etc 6.Surface:White,Black,Tin-coated,amber,etc 7.Processing:milled 8.Point degree:118° or 135°split point