graving tool, pen

Boyd’s Bible Dictionary:

(feather). Anciently, a metal graver for tracing on hard substances; the stylus, of pointed metal or bone, for writing in wax; the reed pen and hair pencil for writing on parchment and linen (Judg. 5:14; Job 19:24; Jer. 17:1).

Concise Bible Dictionary:

A general term for any implement used either for cutting an inscription on stone or metal, or a reed for writing on papyrus or parchment (Judg. 5:14; Job 19:24; Psa. 45:1; Isa. 8:1; Jer. 8:8; Jer. 17:1; 3 John 1:1,13).

Strong’s Dictionary of Hebrew Words:

Transliteration:
cheret
Phonic:
kheh’-ret
Meaning:
from a primitive root meaning to engrave; a chisel or graver; also a style for writing
KJV Usage:
graving tool, pen