X-Steel brand, registered in Australia. Expert quality! 

Ideal for drilling large and small-diameter holes in stainless steel and plastic plates. The HSS M35 cobalt TiAIN coated allows for fast, accurate starts that generate less heat, resulting in longer bit tip life. TiAIN coating increase the step drill hardness to HRC89,  stands high heating without cooling liquid, enhances durability, whole quality and bit life. For user convenience and accuracy, each bit has laser-engraved reference marks you can see while drilling. The spiral grooved flutes ensures faster & jam-free drilling. Hex shank suits quick change adaptors ensures a solid connection with the drill chuck.

CNC machine manufactured with high accurate size and shape 

CBN grinding wheel milled, smooth and shinning.

6.35mm hex shank

5mm step height

Each piece packed in transparent plastic box

Size options:

1. 4-12mm 4,5,6,7,8,9,10,11,12mm 9 steps bit
2. 4-20mm 4,6,8,10,12,14,16,18,20mm 9 steps bit