Hollaender is the originator of the Speedrail fitting and Speedrail itself so it's pretty easy to understand why they are the best. Without getting into a ton of technical information which lets be honest, it all sounds greek anyway, these Speedrail Fittings rock! Each with two set screws to keep them tight, and no you don't have to go crazy tightening set screws, they grab the pipe very easily. The Speedrail Split Cross is a variation of the Cross. It can be used to attach onto a pipe without taking it out of other fittings. The Split Cross can do things that other Speedrail Fitttings can't. Thia is because of the removable top piece of one of the cross sides. Used for a multitude of car rigging applications as well as most any rigging, the Speedrail Split Cross is in the mix no matter what kind of rig you are building. Buy them in the dozens, you will use every one.