Tiêu đề Hướng dẫn khoanvít Tóm tắt Hướng dẫn khoanvít D

Guidance for drills or screws designet to help your fingers not being harmed.

You just need to put screw on it and focus to push with drillbit :)

In case of drilling - it provide 90 degrees guidance for your drills.

Enjoy!