'Tent pin' in the Bible

Then Jael, Heber's wife, took a tent-pin and a hammer and went up to him quietly, driving the pin into his head, and it went through his head into the earth, for he was in a deep sleep from weariness; and so he came to his end.

Then Jael went out, and meeting Barak going after Sisera, said to him, Come, and I will let you see the man you are searching for. So he came into her tent and saw, and there was Sisera stretched out dead with the tent-pin in his head.

She put out her hand to the tent-pin, and her right hand to the workman's hammer; and she gave Sisera a blow, crushing his head, wounding and driving through his brow.