Mohel have the training, they designate a "mohel". The mohel is specially trained in circumcision and the rituals surrounding the procedure. Many "mohalim" are doctors or rabbis (and some are both) or cantors and are required to receive appropriate training both from the religious and medical fields. Traditionally, the "mohel" uses a knife to circumcise the newborn. Today, doctors and some non-Orthodox "mohalim" use a perforating clamp before they cut the skin. The clamp makes it easier to be precise and shortens recovery time. Orthodox "mohalim" have rejected perforating clamps, arguing that by crushing and killing the skin it causes a
If This Is a Man not merely its lexical but also its inner faithfulness." Robert S. C. Gordon writes that Levi went on to develop a close relationship with Reidt. The German edition contains a special preface addressed to the German people, which Levi said he wrote out of passionate necessity to remind them what they had done. "If This Is a Man" is often published alongside Levi's second work of witness, "The Truce" (Italian title: "La Tregua"). The book is introduced by a poem. The construction "If .." invites the reader to make a judgment. It alludes to the treatment of people as "Untermenschen"