Precise Shape Duplication: Thisi is an easier way to duplicate various shapes, ideal for tiles fitting, laminate and carpet cutting, ceramic and tool mold taking, etc. Adjustable and Locking Feature: The tightness can be adjusted according to your needs. It is especially suitable for drawing the outline of irregular and complex objects. It can be locked and fixed after each adjustment to ensure precision accurate. Easy to Use: Simple operation: push and draw. It is adjustable with only one hand. Fix the pencil in the middle, push and draw. It is easy to draw the lines without error. Available at Both Ends: Designed with pulley end and pointer end, its both ends can be used. The pulley end can achieve smoother drawing while the pointer end can achieve accurate and easy drawing. The pencil clip can be moved up and down, which is convenient for exchanging the shape end. Quality and Durability: Made of high quality metal, it is strong and durable. And it is easy to carry and store. Just put it in your toolbox and take it everywhere with you.