Dunno if it's been mentioned, but for us folks with arthritis that have issues working with hands due to pain... I've found the Gold Star snap press to be extremely handy and cheap enough that it's affordable.
https://goldstartool.com/heavy-duty-press-for-grommets-snaps-buttons-rivets-die-set.html
The Die Set for Ring Snaps 24 Ligne/15mm (5/8") will fit the Tandy Line 24 snaps pretty much perfectly too.
I think I've put together about 10 kits worth of snaps on it so far. Just don't leave it out in your car overnight or anything... if it gets cold and heated up, the "precision casted" metal will precision break