Tiêu đề Nắp đóng lỗ khoan lõi Tóm tắt Một tấm bìa đóng v

A cover to act as a counterpart when filling a core drilling hole. Is flexible enough to get loose afterwards.

There is a hole in the middle where you can knot a line, so you can hold it from the side, where you fill the hole in with cement/concrete