if you need them to be adjustable, try these
http://www.ballisticfabrication.com/...nt_p_1636.html
ive been running these with no problems, other than a tad bit of slop that i took out when i tightened them back down, basically the same joint as above, just no threaded stud
http://www.ballisticfabrication.com/...nt_p_1226.html