YaoSheng 4241 High-speed Steel Stepped Drill - Silver + Golden (6~25mm)
Handle: 1/4 hexagon handle; Material: High-speed steel 4241 suitable for the workpiece with the hardness below 25 degree such as carbon steel sheet iron plate insulation board; Surface treatment: titanize; Stepped drill 6~25mm: 9 steps: 6 8 10 12 16 18 20 22 25mm