Defective Pencil Sharperner

I noticed the blade on my pencil sharpener was loose enough to severely impact on its purpose of sharpening pencils. I found the appropriate small screwdriver and tighten the screw that held the blade in place thereby averting the problem at source. Though I consider that maybe three or four years down the line I may well have to repeat this procedure if the problem reoccurs then. We shall see.