Tired of loose leaky stanchion bases? Use these to mount 1" or smaller stanchions to your toe rail or bulwark.
316L Cast stainless steel. Compare wall thickness to others on the market and you will note that these are 3 times as thick.
There is a large hole for soft shackles and 1/2" clearance at bottom to deck so water and dirt can pass underneath.

They can also be used for supporting grab rails. If support between the ends of the grab rails is needed, the bottom can be drilled out and a tube slid through it.