Secure pen holder for stable, accurate circles The compass features a reliable pen holder that keeps pencils, pens, or metal scribing tools firmly in place, preventing slips and producing clean, consistent lines. Durable combination of wood and metal Constructed as a wooden compass with metal scribing components. The wood body is dimensionally stable and warp-resistant for long service life; metal parts provide precise scribing and dependable wear resistance. Designed for professional use and teaching Suitable as a professional compass for woodworking layout and as a large teaching compass for math and geometry classes. Its design supports repeatable, accurate results whether used in the workshop or the classroom. Compatibility and function Holds common writing instruments (pencils, pens) and metal scribing tools. Adjusts to draw a wide range of circle sizes while maintaining instrument stability and line precision. Key benefits at a glance Improves accuracy: stable holder reduces wobble and uneven lines. Lasting performance: warp-resistant wooden body and metal scribe extend usable life. Versatile: works for woodworking layout, classroom geometry, and general drafting. Use scenarios Woodworking: Mark precise circle cutlines and joinery layouts on wood using the professional compass and metal scribing tool to transfer accurate measurements before cutting. Classroom math and geometry: Students can create precise geometric diagrams, arcs, and circles during lessons and exams; the large teaching compass supports clear, repeatable constructions. Drafting and marking: Use with pencils or a metal scribe to mark patterns, templates, or guide lines on paper, card, or soft materials where consistent circle size and line quality matter. Specifications and performance notes Material: wooden body with metal scribing components. Function: circle drawing and scribing with a secure pen holder for pencils, pens, and metal scribing tools. Durability: dimensionally stable, warp-resistant wood designed for long service life. Intended uses: woodworking layout, professional marking/scribing, math and geometry teaching. What this product solves Eliminates instrument slip and uneven circles by holding writing tools firmly. Reduces replacement and alignment issues caused by warped compasses. Provides a single tool that meets needs across woodworking, teaching, and drafting without sacrificing precision.