Tis true. I've cut and pasted the description out of the catalogue:
Title - Wrench Backstabbing for the use of.
Issue - All tiffies, POT tiffies and Officers of God's Corps.
Use - Sneak up on person which tool is to be applied to. Pat back to ensure that area to be stabbed is clean and smooth (to ensure tool will be undamaged and can be used again). Dig in pointy bit and then twist and tighten until the standard of 'F*cking tight' is achieved.