Apparently they have to drill holes or somesuch. The sling's built in.

(Ross Oliver) writes:

Dave Katz wrote:
There's an additional wrinkle to this that I hadn't considered, but
was pointed out by a Cirrus-savvy insurance broker: the straps make
off-airport recovery of the aircraft much easier because you can hook
them to a crane or heavy-lift helicopter and lift the airplane out,
instead of having to chop it into pieces and drag it. Recovery costs
are not insignificant...


This can't be unique to the Cirrus. My aircraft's maintenance manual
includes a procedure for sling-lifting, and I would think that the same
technique could be applied to many other aircraft. I recall that the
Cherokee that landed piggyback on top of a 152 in Florida was lifted off
by crane and flew away home ;-)