Alvin Geometry Compass 607

Alvin Geometry Compass 607 Gently used condition Model Number: 607 The Alvin Introductory Compass can be used to draw circles with ½-inch up to 10-inch diameters. It measures 6 ½ inches and comes with a replacement compass lead tube. It is packaged in a translucent hard plastic case that provides storage when not in use and allows convenient transport. Features: Size: 6 ½ inches Circle diameter range: 1/2" to 10" With cast zinc body and fiberglass head Features double knee joint Center wheel spindle for adjustment Transparent hard plastic case math, geometry, drafting, navigation, drawing, circles, arcs, mapping