Home / Promotional Merchandise / F1 Convex Keyring F1 Convex Keyring Stylish oblong shape with convex sides to make it a very tactile keyring. Available in clear only so you can print to both sides of the paper insert. Add to Quote Category: Promotional Merchandise Related products PromoMate Element ballpen BIC Wide Body Digital ballpen PromoMate Plunge ballpen Contour-i Argent ballpen