gavel hit to chisel are used to give a sign for a verification of a punishment has been declared in court. this is why a gavel is an icon of supreme power that could bring judgement to convicted person. the poster is to remind the judges to be careful when give a death sentence to convicted person because it is by their action / by their hands that a person life being taken away...
This poster belong to
Death is not justice

Our 2010 project asked for the universal abolition of the death penalty.
For us it’s simple. The death penalty is a violation of human rights.
Article 5 of the Universal Declaration of Human Rights states: “No one
shall be subjected to torture or to cruel, inhuman or degrading
treatment or punishment.”
How does that fit with beheading, stoning, hanging, lethally injecting
or shooting someone?