A scale assembly of a table saw includes front and rear outer slide members at front and rear ends of a slide mechanism respectively; front and rear inner slide members at front and rear ends of a table assembly respectively in which the front inner slide member slides in the front outer slide member and the rear inner slide member slides in the rear outer slide member; a block member secured to a front end of a rip fence assembly and including a channel and a spring biased member; and a lever in the channel and including a trigger, a projection, and first and second recesses in which in a locked position, the spring biased member is biased by a spring to enter the first recess and the projection enters a lengthwise cavity on an outer surface of the front outer slide member.
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