How does Spindle Piece elucidate its Background?
The work is part of Moore's Spindle series of sculptures, which was exhibited in Hyde Park in London in 1968.  The series was inspired by a detail of Michelangelo's painting on the ceiling of the Sistine Chapel, where God's hand reaches towards Adam's finger.  The sculpture is an amorphous twisting flowing form, pierced by a hole, with a point bursting out from each side.  The opposite points suggest the possibility of rotating the convoluted work.  Moore said, "Sculpturally, [Michelangelo's painting is] two points just about to meet. This work is on the same theme, only the two fingers are going out, not in."
Moore also drew inspiration from a piece of flint, cast by Moore in clay, and drawings from 1938; and the work is related to his 1939 work Three Points (LH 211): Moore said, "Here again the points are used to give action: inwards in the case of the Three Points, but here to give action outwards." Another sculpture with a similar theme but with inward-facing points is his Oval with Points (LH 596).
Oval with Points Hyde Park Michelangelo ceiling of the Sistine Chapel