HO scale adjustable parallel track tool (2/pk) - HO scale. Working on the railroad is much easier with our line of track accessories. Space your track the easy way with this handy tool that is designed to keep the same distance between the centers of adjacent and parallel track. You can adjust the distance between the middle of track from 50 mm to 95 mm or from 2 inch to 3.7 inch. Use with both straight and curved track. Rulers on the tools provide measurement in millimeters and inches. Two per package.