Dargan Measuring Wheel 12" Strong metric measuring wheel Comes in a bag Instant zero default Adjustable and folding handle Strong sturdy wheels Plastic Wheel High-quality material Dargan Measuring Wheel 12" This is primarily used for just that – surveying. Generally, a measuring wheel is constructed using an aluminum (or other metal) body and solid or pneumatic tires. As you walk, you push or pull the device alongside. With this measuring wheel, the mechanical dial plate adds when moving forward and subtracts when reversing. It is ideal for large distance measuring. It comes with a travel bag, so you can take it with you easily. Features Wear-resisting Anti-deformation Can be used for a long time Large distance measuring wheel with a foldable handle, firm and durable