Kelly bar extension for digger derrick augers. These can be used to replace a damaged or missing extension shaft or to add to existing kelly bars to dig deeper. The extension bar has a 2 1/2 inch hex female hub and is a 2 1/2 inch hex bar. The bar has holes that are predrilled in 12 inch increments and is 78 inches long including the hex hub. This will give approximately another 6 feet of drilling depth.
