The bolts just need to be snugged down.. But when i first put the easton bars on i snapped one of the bolts. I emailed eastonexp and got nothing so i bought the bolt kit. It comes with all 8 bolts/washers. I was only expecting 4 (like the picture). I love my bars so far though. *I Ordered my bar kit wednesday and it wasnt supposed to come til monday, but it came that friday !