Heavy Duty Metallic Cable Tie Installation Tool for stainless steel cable ties. The DAS250 Ty-Rap® tool is designed for installing ladder type, ball lock, and roller back lock stainless steel cable ties up to 7.9 mm (0.31 inch) width. It features adjustable tension control, automatic cut-off mechanism, and rugged metal construction for reliable performance in industrial, marine, oil & gas, and harsh environmental applications.