Step Drill, High Speed Steel
Purpose Work material, cast iron, carbon steel, alloy steel, tool steel, stainless steel, aluminum alloy
Material High-speed steel (HSS)
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3 Customer Reviews
The reviews are automatic translation.
On 2018-04-07 12:03:01
It is useful because it often opens holes of 4.5 and 8 at once. Although it is processing aluminum, there is nothing broken.
On 2015-04-28 14:05:48
It quickly broke.
Aluminum material fixing screw hole for processing
On 2014-10-25 23:10:05
Pilot hole processing Drill with posterior stage Machine so that the head of hexagon socket head bolt M5 will not protrude. The feeling I used is normal.
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