Rusty Drain Manhole Cover with Triangular Studs
It is a manhole cover made of iron but highly rusted. The drain cover has common triangular studs as the pattern.

It can also be used as a metallic wall materials of a derelict factory.
 
Manhole Cover / Maintenance Hole Cover / Drain Hole Cover Texture
It is a metallic manhole cover having rust, dust and even cement on the surface. The plate is rather bumpy and studs are worn and damaged.

There are 4 presets in the SBSAR file to allow users quickly create a rusty, dirty, full of cement or clean manhole cover.

The SBSAR also gives users the flexibility to change the shape of cover, amount of studs, edge wear level, damage level, rust level, dirt level, texts on the cover, position of labels etc.