hand-held model we associate with our pencil cases is known as a prism sharpener - with its conical hole just below the shaving blade. Versions of it date back earlier than Love’s design.

Having a carpenter's pencil on hand is the right tool for many DIY jobs, as its rectangular design is easy to hold ... It doesn't fit in a common sharpener, although you can purchase sharpeners ...

Trump limits Kellogg's role to Ukraine envoy after Russian complaints Netflix adds 'wildly entertaining' Marvel movie just months after it was in cinemas Fixing the US Navy's shipbuilding problems ...