Features: There are 2 different sizes, 25cm/40cm, choosing your own. Great tool for making contours and circles,also used for marking. Used with the included pencil or with a slim ballpoint pen. Professional carpenters compass for woodworking, carpentry, metalworking or leather work. Also the best gift for carpenter friends. This pencil is a carpenter quality precision tool made of PP Plastic and alloy, durable. Specifications: Material: PP+Alloy Length: 25cm/40cm(optional) Max semi-diamater: 75cm Package Includes: 1x Drafting Compass note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.