High hardness, works well in cutting and drilling.
Excellent workmanship, stable performance and durable.
Suitable for drilling hole of the cast steel, alloy steel and gray cast iron, etc.
It includes 25 sizes(1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10, 10.5, 11, 11.5, 12, 12.5, 13mm) in one drill bit set, which meet your different needs perfectly.