Features: 1. Professional woodworking compasses, slide the speed nut for quick and smooth adjustment until it comes into contact with the center collar. The needle-tipped metal nib makes for a solid engraving that won't slip. 2. The nib has high strength, not easy to deform, durable, with adjustment knob switch, you can control the grip length of the pen. 3. The compasses machine is a great tool for making outlines and circles, also for edge marking, use with pencil or ballpoint pen. 4. The large compasses are suitable for geometry professional compasses and woodworking compasses, ideal for school, woodworking or home use. Best circular drawing tool for students, artists, mathematicians, carpenters. 5. This circle making compass is suitable for woodworking, the maximum semidiameter is up to 75cm, small and light, easy to carry and work. Specifications: Product item: Circle Pencil compass Material: PP Color: Orange Type A: Size: 25*90cm /9.8*35.4in Unilateral length: 25cm/9.8in The maximum semidiameter is about: 45cm/17.7in Type B: Size: 40*150cm /15.7*59in Unilateral length: 40cm/15.7in The maximum semidiameter is about: 75cm/29.5in Package included: 1 x Circular Marking Tool (Size on your choice) 1 x Pencils 1 x Ballpoint Pen