Integrally-made ultrathin circular blade of cutting tool

A cutting apparatus comprising:

• a circular blade having a cutting edge at a periphery thereof, said circular blade having a fastening hole formed in a center thereof, said circular blade having an annular reinforcing protrusion formed therein and extending outwardly from a plane of one side of said blade, said annular reinforcing protrusion being entirely radially spaced from and extending around said fastening hole, said protrusion located between said cutting edge and said fastening hole, said circular blade having an annular indentation formed on an opposite side of said blade corresponding in location entirely with said annular reinforcing protrusion;
• a cutting tool having a single planar receptacle surface and a handle extending outwardly therefrom, said annular reinforcing protrusion having an outer surface juxtaposed against a planar receptacle surface, said receptacle surface having a hole formed therein, said opposite said of said circular blade being exposed on a side of said cutting tool opposite said planar receptacle surface;
• a locating element extending through said fastening hole of said blade and said hole of said receptacle surface;
• and
• a nut secured to an end of said locating element such that said blade is retained against said receptacle surface.