These handles are made from four Stainless Steel wires twisted together to form a 5/16" diameter handle. They are strong, yet flexible. There is a plastic hand grip on one and and 1/4" NPT male pipe thread on the other end. Overall length is 6-feet. Use the extensions to make up as long of a handle as you require. NOTE: These handles only fit on SKU 9565 Pipe Brushes.