Heavy duty stainless steel swivels and welded rings. Accommodates trolling speeds of 1.0 to 3.3 mph and comes in dozens of tournament winning colors. OPTI Inticer 2-fin blade design creates tons of flash. Made in the USA For years, Pro King has been an industry leader in salmon flasher design and innovation. All of the Pro King flashers incorporate the Opti Inticer 2-fin blade design that reflects light like no other. They also come standard with heavy duty stainless steel hardware and welded rings to stand up to those monsters you are most certain to bring in!