Technical problem How to make the tool-the ploughshare with two-sided blade? Technical situation During 5 000 years, since Mesopotamia when it was used for the first time until today, only the ploughshare with one blade on the bottom was used for the horizontal cutting of the furrows.

Exposition of the essence of the invention The primary aim of this invention is to make functional cutting tool-the two- sided blade ploughshare. This ploughshare consists of the body with one blade on the bottom and the other on the top. The edge of the blade can be situated on the frontal or rear side of the ploughshare. There are 3 holes or more (it depends on the size of the ploughshare) which are used for fixing the ploughshare to the holder and the plough.

Brief description of the pictures The pictures included into the description and which make the part of the description of the invention show the best way, until now, of manufacturing the invention help to explain the essential principles of the invention. <BR> <BR> <P>Picture 1. -Plan and section of the ploughshare holder,<BR> Picture 2. -Plan and section of the ploughshare with two-sided blade (4a, 4b),<BR> Picture 3.-Complex drawing : the ploughshare holder and the ploughshare with the screw (3), Picture 4. -The ploughshare with the holder fixed to the plough.

Detailed description of at least one way of realising the invention Presumed realisation of the invention with the connected plans will be now presented in details. If you look at the picture 2. you will see that the cutting tool-the ploughshare has two blades. One blade is on the bottom (4a) and the other on the top of the ploughshare (4b). This ploughshare has 3 holes or more (depending on the size of the ploughshare) which serves for fixing the ploughshare to the holder. Both the ploughshare and the holder are fixed to the plough with the screws. If the bottom blade is damaged or blunt, the ploughshare is taken off from the holder and twisted for 180'and fixed again so that the top no-blunt is put into the bottom cutting position.

The way of application of the invention Using the cutting tool-two-sided blade ploughshare we get practical and useful cutting tool which can be economically produced and which contains the relevant-news if compared to the ploughshares with one blade, and that is: two blades. The two-sided ploughshare is fixed to the plough with the screws on the same place (until the bottom part of the plough board) and the same way as one blade ploughshare, but together with the ploughshare carrier.