An FRL (filter-regulator-lubricator) appliance is key to preparing clean air for use in pneumatic system tools. Use of prepared air allows tools and equipment to operate with maximum effectiveness and efficiency. Always use a filter-regulator-lubricator (FRL) with Reed pneumatic tools such as the Saw It®, Rapid Cut & Bevel™ Machines, and Universal Pipe Cutters. Failure to use an FRL may result in premature motor failure and will negate warranty.