The Sharpwriter has been around for decades and remains the cheapest mechanical pencil in the Sanford/Papermate line amongst all of its properties. It is an unholy abomination that you should probably consider killing with fire.
The Uni Shalaku S is a side click pencil that appears to (mostly) be available at retail in the UK. So I appreciate being sent this pencil that would be difficult for me to obtain in the US!