Precise Shape Duplicating: - An easier way to duplicate different shapes, ideal for laying tiles, laminates and carpets, ceramic shapes and tools etc. Adjustable and lockable function: - The tightness can be adjusted according to your needs. It is particularly suitable for drawing contours of irregular and complex objects. It can be locked and fixed at each setting to ensure precision precise. Easy to use: - Easy to use, press the button, namely adjustment with one hand. Fix the pencil in the middle, press while drawing to draw the lines easily without error. Quality and Durable: - Made of high quality metal, it is strong and durable. Easy to carry and store, just put it in your toolbox and take it with you anywhere. Both Ends Can Be Used: Designed with pulley and spike end, both ends can be used. Smooth drawing with pulley end, while drawing precisely and easily. The pencil clip can be moved up and down, which is convenient for changing the mould.