Staedtler comfort compass, w/ spare lead, 3-1/4″x1/2″x7-1/2″, nickel all-metal spring-bow compass feature a center wheel that delivers precision setting and prevents unintended setting adjustments. Maximum circle diameter is 10-3/8” (265mm). Design features interchangeable lead part and a nickel finish to resist rust and stains. Compass includes a spare lead tube and comes in a plastic wallet.