Chesterton 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).
No. 003400; Knife for Packing RIng Cutter Reorder No. 003402