Leaf springs with two holes, not three holes, probably for WPL, not for JJRC scale RC models. Anyway, I have bought it to make the RC model's suspension softer and mote realistic. Well, if it will have fitted to my JJRC, then thanks to the seller for the price of this item, but again: the seller offers 4 pieces, when normally they are being used on either JJRC's or WPL's trucks in 1/16 size format (I do not know untill my scaled RC model has arrived to me). Their SUVs on same chassises are of 1/14 or 1/12 scale 'sizing' -- for the latter one to be correct or not.