Replaced oem belt for 42 inch MTD yard machine with this belt .my oem belt lasted 5 years with use of mower once a week from March to October with a little torque on the blades every now and then from the blades having to slow due to higher grass . Well I replace the belt with the stens it torque one time and stretch the belt by a inch . Purchased MTD Brand belt and replaced finished yard and have already cut the 1.5 acres 3 times no problems . MTD is stronger better . And only 10.00 more