Twin insert tool on ebay

[old mart]

Please tell me how this unusual lathe tool would be used: https://www.ebay.co.uk/itm/kenametal...4AAOSwjXNbG7FN

[Sparky_NY]

The description calls it a facing tool. Used that way, one insert would do the roughing and the other a wiper that does the finish cut, all in one pass.

Still a very unusual tool.

[754]

Or some special use like champhering or dual grooves.