0-10mm Waterproof Dial Indicator MW-400-06B by Moore & Wright

DPI, or dots per inch, is a measure of the resolution of a printed document or digital scan. The higher the dot density, the higher the resolution of the print or scan. Typically, DPI is the measure of the number of dots that can be placed in a line across one inch, or 2.54 centimeters.

IP (Ingress Protection) ratings ensure that the tools can withstand the conditions typically found in such environments. Here's a basic summary of IP ratings suitable for a tool shop:IP20: Minimal protection against solid objects and no protection against water. This rating is suitable for tools used in dry indoor environments where there is no risk of exposure to water or dust.IP54: Good protection against dust and debris, and splash-proof against water. This rating is suitable for tools used in indoor environments where water splashes may occur, but the tools will not be exposed to heavy water jets or immersion.IP55 or IP56: Excellent protection against dust and debris, and protected against water jets from all directions or temporary immersion. This rating is suitable for tools used in indoor and outdoor environments where they may be exposed to dust, debris, and occasional water splashes.IP65: Dust-tight and protected against water jets from all directions. This rating is suitable for tools used in environments where there may be significant dust or debris, and water jets are likely to be encountered during cleaning or maintenance.