HTK Company HTK Company designs and manufactures safety ring knives in Upper Sandusky, Ohio, USA. The company was founded 120 years ago by James R. Caldwell, a U.S. Railway Postal Clerk, who had a better idea for cutting twine on mail bundles. The original Handy Twine Knife is on rotating display at the Smithsonian Postal Museum in Washington DC.
BYRD VAULT COMPANY, INC. offers a variety of precast concrete products in several colors and design finishes, including: air conditioner pads, benches, burial vaults, catch basins, chimney caps, custo