BOLT LOCK MANHOLE COVER
Can according to your request to increase the weight
cross pattern, block pattern, diamond pattern,
The handwork manhold cover polish carefully. Bolt lock manhole cover is good at anti-theft, easy and convenient, bottom is opened, not easy to store up sand and dirt, bush bottom have a lug with a hole in order to carry on the position for the open key.
Use non-toxic water-solubility black paint
Widely used in public places, such as roads, parks, squares, green spaces and so on.