Nope. The ones you have are the axial aluminum links, I think. I'm sure they're axial or STRC, which are Identical. Delrin is a space age material. It's like a plastic, but it's super strong and super durable, but it's really really really slippery, think of something like teflon that feels more like a bar of soap when you touch it, only it's REALLY strong and durable. Think of a self lubricating bushing, it's a similar material. It's what my GC2 chassis in the comp build is made out of. So where aluminum causes friction on the rocks, delrin glides over it likes its coated in lubricant, but it's always dry, kinda like magic.