Skills of drilling rhinestones: First, firmly lean the rhinestones against the wall. When drilling, the drill bit of the diamond can't be completely tangent to the wall, and it is easy to deviate when cutting completely. The correct way is to tilt the drill bit downward, with an inclination of about 50 degrees. After the drill bit drills a part of the wall, drill it deeper and then adjust it slowly. After the drill bit is adjusted, don't shake it during driving, which will easily burn out the motor. Occasionally shaking will enlarge the gap between the drill bit and the wall and make it easier to take it out. Another problem is the problem of using water during driving, neither too much nor too little.