Seajet
...
PRV,
I think it's you who are confusing carabiner / snapshackles with piston shackles which are even less safe for dangling oneself in a harness, piston hanks are however spiffing for attaching foresails to a forestay though, where the load is on the cast eye not the piston.
I think it's you who are confusing carabiner / snapshackles with piston shackles which are even less safe for dangling oneself in a harness, piston hanks are however spiffing for attaching foresails to a forestay though, where the load is on the cast eye not the piston.