Zinc fingers are so named because their structure resembles a hand with a pointed finger. They are able to recognize & bind to different 3-letter nucleotide sequences.   ZINC FINGER NUCLEASES are designed to precisely target, find, and cut specific sequences of DNA.

1 α and 2 β  strands with antiparallel orientations,
 that form fingers bound by Zn ion that bind to DNA

Transcription Factors & nucleases also bind to
DNA by means of  Zinc Finger Motifs

Zn finger