Drill holes etc. when installing air conditioning equipment
On 2017-08-03 16:27:40
The spiral pyramid drill can be used for drilling holes or it can be opened from small hole sizes to large holes, which is very convenient.
I used various blades, but this blade lasts long.
Although it is a bit expensive, I can make it in time with a single book rather than using a number of drill blades
It is a big success at work