Cold drawn round and hex steel bars from Columbia Steel & Wire With over 40 years of manufacturing experience, Columbia Steel and Wire is "The Source" for quality cold-drawn round... and hex steel bars in metric and decimal sizes. If your job calls for a few thousand pounds or a truckload or more, Columbia has the skill and knowledge to produce your order... to the exact specifications you require. Count on Columbia for top-notch quality cold-drawn round and hex steel bars, competitive pricing, on-time delivery and courteous customer...