Square :

A set square is an instrument of measurement and / or outline that has form of triangle isosceles rectangle, this is with his(her,your) two catetos equal.






Rule :

Instrument of measurement. It(he,she) rules (instrument)







Clamp :
Sergeant, in some army registers, is a military intermediate degree between(among) the end and the sublieutenant. In some countries it can be a question of the " second sergeant ", if it has been promoted for fulfilling the minimal requirements of antiquity(antique) and performance(discharge) marked by the own(proper) regulation of the institution, or " the first sergeant ", if it(he,she) obtained the degree for merits, though equal it(he) can be promoted by antiquity(antique) in the degree of the second sergeant.


Scissors :

The scissors are a tool of court(cut) used in wide areas of the human activity. It(he,she) consists of two metallic leaves(sheets) sharpened by the interior side, ended in a hollow where they can introduce the fingers, and articulated in an axis(axle) for his(her,your) ends. It constitutes a perfect example of lever of the first double order.