Justech 10″ Rivet Nut Gun Hand Riveter Rivet Gun Riveting

This seems to be a well made tool and does indeed work but my goodness it takes some strength. I’ve only set a few rivnuts so far and they are fine but really you do need some strength to set them. I thought something was wrong at first as I just couldn’t squeeze the thing hard enough to do the job. Even using two hands it was massively difficult and I’m no weakling.
I found that unscrewing the rivnut a bit made it easier but still hard. I will try oil/grease on the tool but doubt it will help. I think I’m going to have to get a couple of pieces of suitable tubing to extend the handles a few inches for more leverage and just hope I don’t damage the tool or rivnuts in use.