Jim Buckley showed how gardeners can produce a beautiful edge to pruner or shear blades by applying an inexpensive diamond hone (the purple object in his right hand) at the correct angle to the blade and giving it a few strokes. Diamond hones are handheld sharpeners that sell for $5.95 and up. They come in coarse, medium, fine, and super-fine "grits" for producing varying degrees of sharpness.