Johnsons 9 drafting compass is ideal for scribing arcs and circles with the steel point producing consistent accurate markings. Easily adjust the legs for precision drawings and repeat measurements up to 9.5 diameter. Its durable all metal body with protective finish is resistant to rust and is built to withstand rough jobsites. The non-slip knurled spring head provides maximum control while adjusting legs to secured position. Comes with replacement lead and locking hardware for maximum efficiency.