Tool

Abstract

A tool for driving a fastener comprises a first fastener corner and a second fastener corner and a first fastener flat surface extending therebetween having a flat surface length. The tool also comprises a socket with a socket cavity having a first tool recess arranged to receive the first fastener corner and a second tool recess arranged to receive the second fastener corner and a first protruding portion between the first tool recess and the second tool recess. The first protruding portion is arranged to engage the first fastener flat surface at a first protrusion engagement position between 34% to 41% of the flat surface length from the first fastener corner and the protrusion height of the first protruding portion is 2.8% of an opening dimension of the socket cavity.

Dependencies are inferred from the claim text.