scarifiers

/S K AE1 R AH0 F AY0 ER0 Z/
noun
  1. 1

    One who scarifies.

  2. 2

    The instrument used for scarifying.

  3. 3

    An implement for stripping and loosening the soil, without bringing up a fresh surface.

Source: https://en.wiktionary.org/wiki/scarifier, https://en.wiktionary.org/wiki/scarifiers