General Tools 843/3 Pencil Compass and Scriber is a 3-pack of Generals popular 843/1 compass and scriber tool. Use this pencil compass and scriber to scribe and draw circles. It has a positive wingnut adjustment. The full-length hardened steel pin is in a metal frame for greater rigidity. It is constructed of brass plated steel. COMPASS AND SCRIBER: Designed for marking contours and drawing circles or arcs. ADJUSTABLE: Positive wing nut adjustment up to 8 inches. STURDY: Full-length hardened steel pin in metal frame for greater rigidity. DURABLE: Constructed of brass plated steel. VERSATILE: Can be used with most pens and pencils. Pencil not included. GENERAL TOOLS: We're a recognized leader in designing and developing specialized precision tools dedicated to delivering exceptional customer service. We encourage artisans and DIYers to work smarter, measure better, and repair more productively.