(Source:http://www.google.co.in/search?hl=en&q=stone+age+tools&bav=on.2,or.r_gc.r_pw.r_qf.
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.4900.0j2j12j5-1j1.16.0...0.0...1c.1.E-a6hp4sqpA&pbx=1&bav=on.2,or.r_gc.r_pw.r_qf.&fp=983
88d74645de5f9&bpcl=35466521&biw=982&bih=387 ; Oct. 23, 2012)

After mastering the basic tools, in the next step it is required to perfect the performance. During the Late Stone Age man established another benchmark- tying knots between two different materials (plate 4A). Wooden stick is tied with stone blade making each tool (plate 4B) much efficient and could convert lesser energy to achieve maximum force. Commonly animal leather is used for tyinghammer (plate 4A); piercing activities could be done with lesser effort with much more precision. With a long wooden handle hammer (plate 4C) is made to exert maximum force. Man understood his weaknesses or deficiency against other living beings. In order to overcome the difficulties human being started inventing tools. Observation of nature taught man to design and made tremendous progress in term its efficiencythrough the years of experience.However the size, form and shape may change because the required functioning (some time multi-tasking) basic concept has remained same.

Along with the material study the later period developed required tools for the purpose of shaping the forms. Once man understood the technique of metalwork forming various shapes manufacturing handicrafts and household products became more effective and durable.