The belt tensioner set ensures that the belt always fits the wheel grooves during high-speed operate, reducing the risk of falling off and avoiding chain damage caused by belt failure durability construction ensures from the, and accurately regulate belt tension for a long time The 4238 660 0400 Belt Tensioner Assembly ensures optimal power transmission for TS410 / TS420 concrete cutting cutter through selfadjusting tension control, maintaining peakly while enhancing fuels efficiency Crafted with stainless steel components and reinforced, this replacement part ( fit 4238 660 0400) features a secure pulley alignment systems to belt slippage during high speed operate Ideal for professional construction crews and enthusiasts requiring reliability maintenance solution for heavy duty concrete cutting equipment, Manufacturer: RGYBAO