They are fucking tanks. 7.2lbs I believe, heavier than 916s. Suitable for charging skis like XXLs/Big Dumps/Motherships/RC112s, not so suitable for more playful skis. They are 100% solid (my brother has two pairs on his Legend Pros and Big Dumps), but it is a lot of weight to carry around.
^ what i was gunna say, iv got a pair on my XXLs and i love them, they feel so solid. but the heel piece is so long it might ruin the softer flex pattern of the chetlers. id put a pair of sth 16s on them, thats what i use on my ep pros.