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 accuracy. No More Guesswork And Complex Operation: Just fix your pen by turning the gear, then do the copy and trace at the same time, which is much more convenient and precise, while tracing please keep it move parallel. Both Ends Can Be Used: Designed with metal contact roller and pointed end, the contact roller can help to reduce friction losses for protecting the item surface, and the pointed end will do more precise profile copy. Easy To Use: Profile tool is ideal for fitting tiles, laminate laying, carpet cutting, checking dimensions, molding and any kinds of work needs the contour duplication. Simple operation, namely push namely draw, one-handed adjustment. Portable 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 everywhere with you.