All Metal Material: The weighty fine compass ensures you a lasting satisfaction Easy Control: Holds tight and lock in place with this adjustable wheel User Friendly: No more slipping from fingers, with this precision geometry compass you can make perfect circles. Maximum Diameter: Creates circles up to 10 inches in diameter Free Bonus: Compass*2, additional leads *6, nuts* 4, screws*4, reusable pouch*2 drafting compass. Small bow compass with precision center wheel allows for extremely fine settings. student compass features micro-set center wheel leg adjustment for added convenience. color: blue Material: Metal Drafting type: Student compass Drawing lead can be sharpened/replaced Center wheel allows for extremely fine settings Micro-set center wheel leg adjustment Include spare leads Easy-to-handle design Easy-to-use Compass bow compass prevents leg movement during drawing. Every kid can change the radius of the circle without any effort and always lock in position to get their desired circles. drawing compass A Must-have Item for School Supply List It's an amazing assistant for kid's math class. It can easily draw small circles without shaking. Kids will have a lot of fun doing circles without ever frustrated. Get your kids ready for each class! compass with lock Back to School Gift It's also a useful back to school your friends, kids and teachers. A geometry compass that let every kid say Goodbye to the difficulty of drawing perfect circles. compass for geometry Suitable for Everyone This professional drawing compass is designed for anyone who like to do Perfect Circles such as Students,Teachers, , Metalworkers, Engineers, Architects, Mathematicians, Artists, Craftsmen and Designers. Package include: 4 set Spring metal compass With related accessories Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.