These are the best scratchers I have used. I have them on my RMK and my ProRMK. And feel they throw the most snow and ice and also allow you to back up without bending them all up.
https://www.gobigparts.com/ICE-STOR...VER-THE-TOP-PERFORMANCE.html?category_id=3182
https://www.gobigparts.com/ICE-STOR...VER-THE-TOP-PERFORMANCE.html?category_id=3182