From H6852 (in the denominative sense (from H6833) of scratching); properly a {claw} that {is} (human) nail; also the point of a style (or {pen} tipped with adamant): - {nail} point.
Jer 17:1The sin of Judah is written with a pen of iron, and with the pointH6856 of a diamond: it is graven upon the table of their heart, and upon the horns of your altars; ▼