Focus on Knife Edge Two Piece 1962–65 and analyze the Sculpture.
The full-size sculpture, catalogued as "LH 516", was cast in an edition of four (or "3+1"; one being retained by the artist). Moore was inspired by the "lightness and strength of bone fragment" in creating the piece. The full-size sculptures, 366 centimetres (144 in) long and weighing about 3 tonnes (3.3 tons), were cast by Hermann Noack in Berlin.
The second cast of the work is located in Abingdon Street Gardens (better known as College Green) in the City of Westminster. The other full-size casts are located near the fountains next to Bloedel Floral Conservatory in Queen Elizabeth Park in Vancouver, BC, Canada, donated by Prentice Bloedel; near the Rose Garden of the Rockefeller family house at Kykuit at Tarrytown, New York. Moore donated his artist's copy (0/3) to the Henry Moore Foundation in 1977, and it is displayed at Perry Green, Hertfordshire.Moore made a larger and reversed version of the sculpture, Mirror Knife Edge 1977 or Knife Edge Mirror Two Piece (LH 714) – which is 5.34x7.21x3.63m or about 17.5x23.7x11.9 feet and weighs about 15 short tons (14 t)  – which was commissioned for the entrance to I. M. Pei's east wing of the National Gallery of Art in Washington, D.C. The work is carefully cleaned and conserved each year to maintain the distinction between its shiny and patinated surfaces, as the artist intended.
National Gallery of Art Hermann Noack Kykuit Perry Green Tarrytown, New York Abingdon Street Gardens Bloedel Floral Conservatory Henry Moore Foundation Washington, D.C. Queen Elizabeth Park I. M. Pei Westminster City of Westminster Henry Moore patina Rockefeller family Vancouver Prentice Bloedel Vancouver, BC, Canada Perry Green, Hertfordshire College Green