Ready Reckoner or disc calculator is a promotional idea that is often designed to have a useful purpose. With a spinning wheel and a hole to reveal answers, some people call these wheel charts, spinners, information discs or eyeletted discs. This product is perfect if you wish to offer a useful technical guide with your branding that will be interacted with on a regular basis. Can be made with two discs or more depending on information reviewing.

We also offer a slide calculator that should be opened out to reveal useful information, this is also kept for reference and interacted with for months or years. Also known as slide guides, promotional slide rules, slide calculator or slip chart.