Atoplee 6pcs 90 Degree 3 Flute HSS4241 Chamfer Chamfering Bit Set Countersink Bit Material: HSS4241;Shank: round handle;Finish: White Diamond Blade Diameter:6.3mm,8.3mm,10.4mm,12.4mm,16.5mm,20.5mm Shank Diameter:5mm,6mm,6mm,10mm,10mm,10mm Length:45mm,49mm,49mm,56mm,63mm,64mm Package Included: 6pcs Three edge chamfering