The tweezers are called cross action, x-action, reverse action, cross lock and I think a couple other names. You can find straight or angled tips. I like a 5” to 6” pair myself.
I use plastic tweezers to load pellets into the Daisy 880 and Crosman 2100 and Barra 1866.
I upgrade the 880 to a bigger bore, best thing I think I did, .30 cal. way easier to get loaded then a flippy .177