The Simplicity 5103587YP Lawn Tractor Deck Drive Belt (52 Deck) helps transfer power from the engine to the mower deck for reliable blade operation. Designed as a replacement drive belt, it runs around the deck pulleys to drive the cutting blades during mowing. Proper belt function supports consistent blade rotation, efficient grass cutting, and dependable deck performance. Replacing ... https://www.wholetoolbox.com/simplicity-5103587yp-lawn-tractor-deck-drive-belt-52-deck/5103587YP.html