It is a secured below-the-ground Ground Lock. When it is not used, it is level to
the ground.

There is a magnet in the lock head. Just any metal item such as a key ring can
be used to pull the lock head from below ground. Then it could lock a variety
of objects such as shutter door, bicycle, motorcycle and roadside banner.
As it is hidden under ground, it would not in the way of either pedestrians or
vehicles. Besides, with sustainable pull-force being to 3.3 tons, it is a safe,
practical and aesthetic new product.

捲閘門地鎖

『捲閘門地鎖』是一把固定在地面下的鎖柱裝置，不用時，它是平地面的，當使用時把有磁石頭的鎖柱，用匙圈接觸鐵金屬，利用磁效應把它吸上來，鎖實物件。其他用途如行人路上或馬路上可鎖單車、電單車、廣告牌等等。當它不用時它會縮回原來平面位置而不會絆倒行人或車輛。鎖身的拉力達到3.3噸，從而做到安全、實用、美觀的新型產品。