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6mm diameter drill bits silver welded with hot-press sintered diamond
segment
for drilling small holes on various stone, granite, marble, ceramic,
concrete, brick, etc.
Silver welded by high frequency welding
machine.
Wet or dry use.
Note:
1. To prolong its using life, better to use with water for
cooling and lubrication.
2. The hole drill bit can be used with bench drill, hand
electric drill, CNC machines.
3. When you using hand electric drill, start slowly at 45 degree
angle and go vertical after you make an initial mark.
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