Screwpop Tool LLC. prides itself by offering only they best in everyday carry items. Our products exceed consumer expectations with highly functional designs that are compact, durable and practical. We are known as, “The World's most Clipable Keychain Tools”. And unlike many other products on the market, Screwpop products fit nicely in a pocket, backpack, glovebox and more. Our designs easily clip to or attach onto a keyring, carabiner clip, paracord, belt loop and lanyard. Inkbiner (Model SP021) Measures Size 3/8" x 1" x 3 "and weights approximately 1.0oz. All metal construction for a lifetime of use. Other handy features include a bottle opener and carabiner clip.