| 摘要 |
A combination ruler and square has first and second elongated straight ruler members with first and second recesses in the upper surface near opposite ends of the first ruler member that receive a tongue extending from an end of the second ruler member to form first and second configurations of the combination that respectively create a square and an elongated ruler. Magnets and detents in the tongue and recesses retain the tongue in a respective recess in the first and second configurations and an extra pair of alignable magnets in the first and second ruler members cause the rule members to be attracted to each other in an aligned storage configuration of the combination where the second ruler member overlays the first ruler member.
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