Antal V-Grip clutch

[jarcher]

Does anyone have any experience with the Antal V-Grip line of clutches:

Antal Marine Equipment

They claim:

Line retrieval can be achieved with the lever closed, the line stops automatically in the new position with no slippage.
The line can be released under load without the use of a winch because the Antal mechanism guarantees easy opening even under heavy conditions.

The no slippage part looks attractive.

I have existing Antal clutches and I need to add a few more, plus replace one that I have. These use the same mounting arrangement.