PERFETSELL 2 Pack Professional Compass Math Geometry with Lock Screws and Lead Replacement, Metal Drafting Precision Spring Bow Drawing Wheel for Woodworking, School

[Premium quality]- These compass/divider set are made of all metal with nickel plating compass,sturdy spring bow,lightweight and very durable unlike plastic compass math easy broken , can be use long time [Professional]- These drafting compass set with spring bow head and center adjustment wheel with automatic locking mechanism can prevents unintentional leg movements, professional makes drawing easy and fun [Precision]- Through accompanied quick setting adjustment with push button these compass for drawing circles up to 10 inches in diameter precisely in math, geometry, art, drafting and drawing for repeat measurements or drawing arcs and circles [Application]-These drafting compass set suitable for kids and adults , great for use in shool , woodworking ,workshop or home , the best circal drawing tool for student , artist , mathematician , carpenter for woodworking, carpentry, metalworking or leatherwork etc [Value pack]-Package include a pair of compasses, 1 black , 1 blue(height:15.5cm/6inch） comes with 6 spare leads, extra spare holding screws and nuts in a clear, reusable pouch for easy to carry and store .