I got both sizes available medium and large. Both have a different radius for how large the fillet is. Medium will be more versatile across the board for me with TIG. For stick or multi pass fillets I think large will be good. The 60 grit is a bit aggressive for a finishing pass, but sure removes material fast. It leaves some grind marks behind as you'd expect from 60. I was able to get a reasonably good finish, and then did a bit of finishing with a flap disk and hand with scouring pads. I wish they came in 80-120 grit on here too, I'd buy them as well