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Uploaded on Aug 13, 2011
Buy at http://www.puzzlemaster.ca/browse/inv..., Copyright (c) 1997 & 2011, M. Oskar van Deventer. Spiral Burr is a six-piece burr of interlocking spirals. Next to sliding and rotation, spiraling is the third fundamental way of turning pieces in an interlocking puzzle. The spirals are notched. The object is putting the puzzle back together after turning it apart.