All Metal Material: The weighty compass ensures you a lasting satisfactionEasy Control: Holds tight and lock in place with this adjustable wheelUser Friendly: No more slipping from , with this precision geometry compass you can make perfect circles. Maximum Diameter: Creates circles up to 10 inches in diameterFree Bonus: Compass*2, additional leads *6, nuts* 4, screws*4, reusable pouch*2drafting compass. Small bow compass with precision center wheel allows for extremely settings. student compass features -set center wheel leg adjustment for added convenience.color: blue Material: MetalDrafting type: Student compassDrawing lead can be sharpened/replacedCenter wheel allows for extremely settings-set center wheel leg adjustmentInclude spare leadsEasy-to-handle designEasy-to-use Compassbow 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 compassA Must-have Item for School Supply ListIt's an amazing assistant for kid's math class.It can easily draw small circles without shaking.Kids will have a lot of doing circles without ever getting frustrated.Get your kids for each class compass with lockBack to School GiftIt's also a useful back to school gift for your friends, kids and teachers.A geometry compass that let every kid say Goodbye to the difficulty of drawing perfect circles.compass for geometrySuitable for EveryoneThis drawing compass is designed for anyone who like to doPerfect Circles such as Students,Teachers, Carpenters, Metalworkers, Engineers, Architects, Mathematicians, Artists, Craftsmen and Designers.Package include: 2 set Spring metal compass With related accessoriesOnly the above package content, other products are not included.Note: Light 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.