I modeled it with nurbs based on the shape of an old wrench that I think it is French.
Interesting old wrenches
FyrMe's Tool Restoration Thread
PDF) Fusing design and construction as speculative articulations
MONKEY WRENCH definition in American English, monkey wrench
1982-1983 Peru Pedagogian - issues 1-16 by Peru State College
aecKnowledge. Online Continuing Education Units for Architects
aecKnowledge. Online Continuing Education Units for Architects
Home - Architecture - CLR at De La Salle-College of Saint Benilde
Universal Open End Wrench Review
PDF) The Methodology of Virtualizing Sculptures and Drawings: A
aecKnowledge. Online Continuing Education Units for Architects