Grinch

I have a similar tool and as Sid said its only designed for recessed pin. You just screw the chain trying to use the riveter else, but then it is never clear in the intructions I was lucky to be show the correct method. Un-recessed pins I favour a ball pin hammer, as long a your slow and careful it does a lovely job. Hammer cost me about 2 quid from a car boot, which is where I get all my best 'older' tools.