1.PORTABLE：This tool is lightweight and portable, with a mini metal handle for easy holding.
2.MATERIAL：Quality metal and plastic shell, tough, wear-resistant, rainproof and durable.
3.EASY TO USE： just put the mini metal wheel on the map and roll it, the pointer would point to the precise scale.
4.EFFECT：It can help you quickly calculate the distance by measuring the distance between two points from the map.
5.GIFT：Nice gift for people who are fond of outdoor activities. Good for outdoor uses, camping, hiking, cycling, hunting, etc.