Durable, impact-resistant case for the most rugged job site conditions. Impact-resistant ABS case would not rust or dent. Blued steel 50 ft length; Blued steel is an exclusive IDEAL innovation. Constructed of highest grade tempered steel and put through our proprietary finishing process, it offers a smooth finish for superior performance and rust resistance. Use blued steel for easier feeding into conduit, easier winding in and winding out.