Proform Manual Piston Ring Filer

The Proform Piston Ring Filer enables you to file piston rings quickly and accurately. It's easy, just position the piston ring firmly against the dowel pins, crank the handle to turn the abrasive wheel. Using a feeler gauge, file the piston ring to meet the manufacturer's specification. The Proform Piston Ring Filer features a replaceable 120 grit carbide grinding wheel.