EBayThe and Instruments 843/1 Pencil Compass and Scriber is for marking contours and circles. Positive wing nut adjustment. Full-length hardened steel pin in a metal frame for greater rigidity. Constructed of brass plated steel. - THE PRECISE TOOL FOR DOING THE JOB EXACTLY RIGHT. Offering over 1,000 tools, we're proud to provide tradesmen, craftsmen, and DIYers around the world with a broad range of affordable, specific-purpose mechanical hand tools and precision measuring and inspection tools. WORK SMARTER, MEASURE BETTER & BE MORE PRODUCTIVE WITH 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 SCRIBE: 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.