Yates Screamer - Zipper:

If Marginal is your MO then you should know all about these, but for those of us who don't they are used to back up less than ideal protection and are basically slings that have been stitched up like a concertina that are designed to rip open when you fall onto them, thereby absorbing much of the fall force and lengthening the fall time so the rope takes more of the force than the dodgy gear you've clipped it to.

The Zipper should be called the Whipper because it is long enough to absorb twice the force of a standard screamer, as it is made for bigger falls. It rips at 2kN, takes 6-8kN force and has an overall strength of 26kN.
Weight: 74g
Length: 35cm