National catalog model No. N2171BC. Designed for tightening or drawing together various lines and cables. These turnbuckles are excellent for marine and other outdoor applications. They are resistant to atmospheric corrosion. Turnbuckles are nonmagnetic. Eyes are passivated for superior corrosion resistance. Hex-shaped body allows for ease of adjustment by hand or with a wrench. Made of stainless steel with aluminum body. Boxed loose. 5 per box.