A rule assembly includes a housing, a reel rotatably mounted in the housing, and an elongated blade having an end hook member on a free end thereof. The elongated blade is arranged to be wound on the reel and to be extendable through an opening in the housing. The end hook member is formed of sheet metal to include a mounting portion and a hook portion bent at a generally right angle from an end of the mounting portion. The end hook member includes a pair of generally upwardly extending side edges, a generally laterally extending lower edge, and recessed edge portions disposed at corner portions at which the upwardly extending side edges and the laterally extending lower edge intersect.