Chesterton’s 178 Ring Packing Cutter permits accurate cutting of rings from spiral or flat coil packings.The scale reads directly in terms of shaft sizes, in inches and in millimeters.

To operate, simply set one scale to correspond with cross-sectional size of packing, set other scale for shaft diameter, and cut ring.

• Handles packing sizes 1/8" (3 mm) through 1" (25 mm) and shaft sizes up to 4" (100 mm).