Step drill bit set

5 pcs Step drill bit set 1pcs 4-12mm,1mm/step,Shank:1/4" hex shank 1pcs 4-12mm,2mm/step,Shank:1/4" hex shank 1pcs 6-18mm,2mm/step,Shank:1/4" hex shank 1pcs 4-22mm,2mm/step,Shank:1/4" hex shank 1pcs 6-35mm,size:6-8-10-13-16-19-21-23-26-29-31-33-35mm,Shank:5/16" hex shank Packed by plastic box