Fastener size measurement tool

A fastener measuring tool for nut and bolt sizes, comprising:

• a body having a handle and a head with a first corner jaw;
• and
• an internally housed sliding shaft slidably coupled with the handle and operable to move within the handle and displaying a measurement of a fastener when the tool is adjusted to the size of the fastener and having a second corner jaw, wherein first and second corner jaws are opposed and snugly grip a fastener.