Cutting Blade

Here it is - in it's form - here it is again
It is a - a little piece - a piece of metal
Found on the - on the farm - just a bit rusty
It is sharp - so very sharp - sharp on the edges
Triangular - triangular - triangular in shape
I can't believe - believe how - how it got this way
The application made
For that cutting blade
Was for chopping hay
But not on rainy days
Now it's known - it is known - what the blade is for
No mystery - to be seen - just so plain to see
Triangular - is angular - and with a sharp edge
Serrated edge - dangerous edge - clears out the hay