[material]: The large pencil marking compass is made of carbon steel, sturdy and durable, with exquisite craftsmanship, which can be used for marking and drawing. [ Dry Point Compass with Wing and Pencil Holder]: Precision compass with locking wing makes it easy to repeat measurements, draw circles, draw arcs, that won't jump or slip out of your control. The wing divider with pencil holder makes it easy to draw circles up to 56 cm in diameter for most materials. This large drawing compass is suitable for professionals. [Easy to adjust and draw]: The wing separator allows you to place the pencil in the pencil holder and fix it, then quickly adjust the desired angle through the wings, center gear and compass leg, get the exact diameter, measure and draw all kinds of circular arcs. With a lockable design, it is a great convenience for adjusting, drawing, duplicating and measuring lengths, arcs and circles. [The compass tips suitable for engraving]: The hard, pointed tips of the dry point compass allow you to draw lines clearly and easily on surfaces such as faux leather, wax candle, metal, wood, plastic and other parts. The square section compass feet benefit grip and balance. The dry point compass is also used to make interval marks for drilling holes. [Strong Practicability Dry Point Compass]: The dry point compass is widely used for mechanical tracing, artificial leatherwork, DIY arts and crafts, etc. tools and equipment. The carpenter's pencil compass is suitable for drawing circles as requested. The large compass for drawing circles is also the best gift for woodworkers, students, engineers, artists, designers and craft craftsmen. Note: The data are all measured manually, please allow 1-3cm error due to differences in light and display, there may be color differences, please refer to the actual item received.