ʻO ke kī hex, ʻike ʻia hoʻi ʻo "Allen wrench" a i ʻole "Allen wrench", he mea hana maʻamau e hoʻopaʻa a wehe paha i nā wili hex. ʻO kāna hiʻohiʻona nui he mau puka hexagonal ma nā wēlau no ka hoʻohana ʻana me nā poʻo hexagonal screw.
ʻO nā wrenches hex i hana ʻia e kā mākou hui i hana ʻia i ke kila kila kila kiʻekiʻe a hana ʻia i ka mālama wela kūpono a me ka mālama ʻana i ka ʻili e hōʻoia i ko lākou paʻa a me ka lōʻihi. Ua hoʻolālā maikaʻi ʻia ka wīwī, loaʻa kahi lima ʻoluʻolu, maʻalahi ke hana, a hāʻawi i kahi paʻa paʻa.