The Masterbow is an essential tool for engineers, designers, and creatives dealing with precise measurements and geometric shapes. This compass features two hinged legs for accurate and convenient setting. The precision-set center wheel and gunmetal spring prevents flex-back for precise setting of both small and large radii.Details:Makes maximum circle of 10.25" (26 cm)Includes protective plastic pouch with a box for lead or spare partsFeatures nickel-plated matte finish that resists tarnishing and finger stains