The Lufkin 4 in. Dual Wheel Plastic and Aluminum Measuring Wheel may be used on curved, horizontal and vertical surfaces for versatility. It keeps pace with you and is designed to measure as quickly as you can walk.Features Gear Based Measuring System is More Accurate and Durable Than Traditional Belt Style Counter Center Mounted Counter for Better Balance and Accuracy Collapsible Handles for Storage Rigid Rubber Tread Provides Balance and Control Over Rough Terrain Hi-Viz Orange to Help Identify Wheel on Crowded Jobsite Specifications 4" SAE Tape Length: 4"