Warm Prompt:
1. On the new tools must be installed when the tool is to try whether the beating. have to adjust to not jump to use. Otherwise the tool is quickly worn out and the carved object are not very smooth.
2. Be sure to cool the water (like a drip device like a drip in a hospital) when you carving. if dry drilling then the diamond on the head of the tool is graphitized by overheating, and it is quickly worn out.
8 pieces 3/32'' shank diamond burr bead reamer