Therefore Thingol took thought for arms, which before his people had not needed, and these at first the Naugrim smithied for him; for they were greatly skilled in such work, though none among them surpassed the craftsmen of Nogrod, of whom Telchar the smith was greatest in renown. A warlike race of old were all the Naugrim, and they would fight fiercely against whomsoever aggrieved them: servants of Melkor, or Eldar, or Avari, or wild beasts, or not seldom their own kin, Dwarves of other mansions and lordships. Their smithcraft indeed the Sindar soon learned of them; yet in the tempering of steel alone of all crafts the Dwarves were never outmatched even by the Noldor, and in the making of mail of linked rings, which was first contrived by the smiths of Belegost, their work had no rival.
(Silm, Chapter 10, Of the Sindar)
The Helm of Hador was given into Thingol's hands. That helm was made of grey steel adorned with gold, and on it were graven runes of victory. A power was in it that guarded any who wore it from wound or death, for the sword that hewed it was broken, and the dart that smote it sprang aside. It was wrought by Telchar, the smith of Nogrod, whose works were renowned. It had a visor (after the manner of those that the Dwarves used in their forges for the shielding of their eyes), and the face of one that wore it struck fear into the hearts of all beholders, but was itself guarded from dart and fire. Upon its crest was set in defiance a gilded image of the head of Glaurung the dragon; for it had been made soon after he first issued from the gates Morgoth.
...
Now Thingol had in Menegroth deep armouries filled with great wealth of weapons: metal wrought like fishes' mail an shining like water in the moon; swords and axes, shields an helms, wrought by Telchar himself or by his master Gamil Zirak the old, or by elven-wrights more skilful still. For some things he had received in gift that came out of Valinor and were wrought by Fëanor in his mastery, than whom no craftsman was greater in all the days of the world. Yet Thingol handled the Helm of Hador as though his hoard were scanty, and he spoke courteous words, saying: "Proud were the head that bore this helm, which the sires of Húrin bore."
(UT, Narn i Hín Húrin)
Slowly Aragorn unbuckled his belt and himself set his sword upright against the wall. 'Here I set it,' he said; 'but I command you not to touch it, nor to permit any other to lay hand on it. In this elvish heath dwells the Blade that was Broken and has been made again. Telchar first wrought it in the deeps of time. Death shall come to any man that draws Elendil's sword save Elendil's heir.'
(LoTR, III-5)
Angrist - 'Iron-cleaver', the knife made by Telchar of Nogrod, taken from Curufin by Beren and used by him to cut the Silmaril from Morgoth's crown. 215, 219
Narsil - The sword of Elendil, made by Telchar of Nogrod, that was broken when Elendil died in combat with Sauron; from the shards it was reforged for Aragorn and named Anduril. 364-5
(Silm, Appendix)