Compact map rangefinder wheel for fast, precise distance measurement on maps and map cards. Key benefits Precise map readings: place the metal wheel on the map or card and roll it between two points; the wheel aligns with the scale to show the exact distance. Simple and fast: no calculations or rulers needed — measure routes and plan trips in seconds. Lightweight and portable: easy to carry in a pack, glove box, or map case for on-the-go navigation. Durable metal components: metal wheel and included metal replacement part provide a secure grip and long-lasting performance. What it does and why you need it Converts drawn routes on paper maps into usable distances quickly, removing guesswork when planning hikes, drives, or backpacking legs. Helps you compare route options and estimate travel time or supplies without electronic tools or phone signal. Works with standard paper maps and map cards to support traditional navigation and trip preparation. Key attributes Function: manual rolling rangefinder wheel that points to the precise scale on a map or card. Compatibility: designed for paper maps and map cards; ideal for standard map scales. Material: metal wheel plus a metal replacement part for secure handling. Size/weight: compact and lightweight for easy storage and carrying. Performance: quick, reliable distance readings for practical route planning. Typical use scenarios Hiking: measure trail segments on a topo map to estimate distance and plan water or rest stops. Traveling and backpacking: convert map routes to distances for daily mileage planning and packing decisions. Trip preparation and navigation: check detour distances, compare alternative routes, and verify map-based directions before departure. What to expect A straightforward, mechanical tool that complements maps and traditional navigation methods. Easy-to-use operation: place, roll, read — no batteries or apps required. A compact accessory to keep with your map kit for reliable, on-demand distance measurement.