The Fellowes 4 Ounce Powershred Shredder Lubricant conditions the cutters to extend the life of your shredder. For best results, oil your shredder each time you empty the wastebasket or a minimum of twice a month. The 4 oz. plastic squeeze bottle with extended nozzle ensures complete coverage. Its for use with all Fellowes cross-cut and micro-cut shredders.