What is the difference between Mono and Digrinders?

[Paris]

see title, I guess

[Ice Sniper]

Mongrinders are for 1-3 star (*) items, Digrinder are for 1-5 (only use for 4-5) and trigrinder are for 1-7 (only use for 6-7)

[garmrodin]

I think the rarity of the weapons you can use them on

[Paris]

Thanks, that answers that.

[kirtblue]

beat me to it ice sniper good job sir