KEY n.
re a crank, pulley, coupling, etc., upon a shaft, and prevent relative turning; sometimes holding by friction alone, but more frequently by its resistance to shearing, being usually embedded partly in the shaft and partly in the crank, pulley, etc.
LACE n.
cord, or band, usually one passing through eyelet or other holes, and used in drawing and holding together parts of a garment, of a shoe, of a machine belt, etc. His hat hung at his back down by a lace. Chaucer. For striving more, the more in laces strong Himself he tied. Spenser.