a tufting machine modular gauge assembly that allows damaged or broken gauge elements to be replaced individually . the modular gauge assembly consists of a gauge bar with a plurality of modular blocks removably attached to the bar . the modular blocks are six sided with a detent and fastener mechanism for attaching the block to the gauge bar . the gauge elements may be attached to the block by dedicated screw - pins or by a securing pin that passes through all the gauge elements within a block .