The MTD 756-0638 Lawn Mower Double Pulley helps transfer power through the belt drive system on compatible MTD lawn mower applications. This double pulley guides and supports belt movement between connected drive components, helping maintain proper power transmission during operation. It is a practical replacement for a worn, cracked, bent, or damaged pulley that may cause belt slippa... https://www.wholetoolbox.com/mtd-756-0638-lawn-mower-double-pulley/756-0638.html