Module 14 : Complex Paradigms in Product Design
  Lecture 40 : Wrench, Wallet, Desk-Top Computer
 

Wrench

https://encrypted-tbn1.gstatic.com/images?q=tbn:ANd9GcR0mXTUg16VEPpdvEJbveFifomeyEsZLycJml8k1Da3jwjU7dsV
http://www.mastertectools.net/image_atmx/19204.jpg
http://www.iamanangelchaser.com/files/stamped_tools/taiwanese_bicycle_wrench.jpg
'Bench Wrench' by Dillon Preceision Manufacturing. Designed for servicing Dillon's high-end reloading equipment.
Plate TorqueWrench 
5B Wrench 
  5C Multi-purpose Wrench  
5D Bicycle Wrench

(Source:5Ahttps://www.google.co.in/search?hl=en&q=Wrench&bav=on.2,or.r_gc.r_pw.r_qf.&bpcl=
38093640&biw=1350&bih=602&um=1&ie=UTF8&tbm=isch&source=og&sa=N&tab=wi&ei=f42cUPu
ZMoXkrAes6oDwAQ#um=1&hl=en&tbm=isch&sa=1&q=bicycle+wrench&oq=bicycle+wrench&gs_l=
img.1.0.0j0i24l2j0i5i24l7.19832.20901.2.22738.4.4.0.0.0.1.625.1195.0j2j0j1j0j1.4.0...0.0...1c.1.cWC
GiLliGPM&pbx=1&bav=on.2,or.r_gc.r_pw.r_qf.&fp=151f031b3100d2de&bpcl=38093640&biw=1350
&bih=602 ; Nov. 9, 2012
5B & 5C: http://www.iamanangelchaser.com/files/stamped_tools/stamped_tools.html ; Nov. 9, 2012)

Wrench-US or Spanner-UK (plate 5B) is a tool that is used for providing grip and applies torque (plate 5A) to turn an object. It tightens by using rotary motion. Usually nuts and bolts are tightened by using wrench. Spanner or wrench may be designed to perform multiple tasks (plate 5C) with the help of one tool. Depending on Usually bicycle wrench (plate 5D) is designed to perform multiple tasks. It is a complex paradigm that has combination of other simple paradigms built in it.