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 Ideal for professional construction crews and enthusiasts requiring reliability maintenance solution for heavy duty concrete cutting equipment 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 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, Manufacturer: NEWFT