This set of three clearance gauges handles different railroading eras as defined by the NMRA: pre-1920, 1920-1969, and post-1969. The dimensions adhere strictly to NMRA spec S-7 (02-11). Each gauge has index pins that align it precisely to the rails, plus a hole in the center so it can be affixed to a rod and inserted into tunnels, between buildings and in other tight spots where fingers won't fit. Precision milled from durable 0.5mm stainless steel, these tools will last a lifetime.
• NOTE: These gauges are designed to meet NMRA specifications. NZT cannot be held responsible for commercial products that do not comply with NMRA clearance specs. Please check your rolling stock against the gauges to verify compliance, and adjust your modeling practices accordingly!