What is with left or right hand.

I am wondering about the rod ends or hiem joints they have both left and right hand. I am going to hard mount one side of all four links and have adjustable on the opposite. My question is wich hiems do i need left or right??? It may sound slike a dum thing to ask but i am curious.

For some more info i am going to be running 1 1/2'' x 1/4''wall lowers and 1'' x 3/16'' upper bars.

They are talking about the direction of the threads. right hand is normal and left hand is backwards from that. i would get right hand if your building your own because it is easier. the reason they have both is if you make both ends adjustable then you put a differant one on each end an then you just have to losen the jamb nuts and turn the bar you dont have to take the end out to spin it. hope that helps.

More than you know man. thank you for the help.

Right hand thread is the most common like stated above. I like to use right hand on one end and left hand on the other end of my 4-links because it makes it easier to adjust in the chassis.