The Briggs & Stratton 692191 Drive Pulley Key 91539 OEM is a genuine replacement part designed specifically for Briggs & Stratton gas lawn mowers. This individual drive pulley key is compatible with Briggs & Stratton models and is essential for maintaining and repairing your lawn mower. With the trusted brand name and precise fit, you can rely on this OEM part to get your lawn mower up and running smoothly again.