Durable All-Metal Construction: Crafted from high-quality materials, this compass boasts exceptional strength and durability, ensuring long-lasting performance. Easily replaceable wires enhance its longevity and versatility. Precise Geometry Adjustment: Empower students with precise geometric creations using the adjustable knob feature. Securely lock the compass in place for steady writing and accurate measurements, ideal for educational and professional use. Versatile Mathematical Tool: Unleash your creativity in mathematical geometry and artistic endeavors with this precision compass. Its innovative design prevents slippage during drawing tasks, promoting accuracy and efficiency. Enhanced Stability and Control: Equipped with a spring bow and thumb wheel, this compass offers enhanced stability to prevent unintended movements. The compact, lightweight metal structure ensures a secure grip, perfect for seniors, apprentices, and professionals alike. Multipurpose Drawing Companion: Perfect for creating circles or arcs with precision, this compass is a versatile tool suitable for mathematics, art classes, painting projects, and carpentry tasks. Elevate your work with this reliable and efficient instrument. Item Name: Compass Material: Metal Features: Multi-functional, Engineering Drawing, Geometry Drafting Size Details: Length: 11cm/4.33" (Approx.) Maximum Circle Radius: 4.6cm/1.8'' Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Compass