The Tool or The Tool-64 by Tri Micro (also distributed by Handic) is a BASIC extension for the Commodore 64 that has many handy instructions. Most deal with the screen and cursor manipulation, but also some utilitarian features such as program renumbering and string manipulation.

I want to thank Matt C. for this bit copy which he made with nibtools and a modded 1541.  Although there are a couple other postings of this tool on the site, none are of a clean full version of the original floppy.

If you are interested in additional information (manual and cartridge image) along with applications and demos that are related to The Tool, check here.