Adjustable and Locking Features - The tightness of the Precision Contour Gauge can be adjusted to your needs. Lockable fixation after each adjustment for accurate accuracy Both ends can be used - designed with pulley end and pointer end, pulley end for smoother drawing; pointer end set for accurate and easy drawing PORTABLE AND DURABLE - Made of high quality metal and ABS, it is sturdy and durable. Easy to carry and store, just put it in the toolbox and take it with you Easy to use - easy to operate, just push and draw, adjust by hand, fix the pencil in the middle, the pencil holder can move up and down, push while drawing, easy to change the shape end Widely used -- Easier to reproduce a variety of precise shapes, especially suitable for contouring irregular and complex objects. Ideal for tile fitting, laminate and carpet cutting, ceramic and tool mold taking, and more