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20mm Diamond drill
bits silver welded with crown shape continuous rim segments for drilling stone
granite concrete brick, etc., common uses would be small projects such as
drilling out sink holes for faucets.
The unique design with crown type can effectively improve the
sharpness, also, the slots allow good discharge removal and get
better cooling.
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.
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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