The Harmony Slidelock Foot Brace Kit adjusts via an extension rod that places positioning literally at your fingertips. No more reaching down into the hull to find that hidden trigger. Simply lift the grip at the end of the rod, slide pedal to desired position and lower grip. Full 13" range of pedal adjustment. The Slidelock is specifically designed to provide secure footbrace position and to resist "pop out." Aggressive foot pedals help cold wet feet stay in place yet are comfortable on bare feet. Retrofittable to conventional footbrace systems. Kit includes pair of footbraces with adjusting rod and hardware.
This worked well as a retrofit in my (no idea what manufacturer) third hand kayak. It's not the same hole spacing as non-sliding footbraces, so if you're not sure, measure the space between your mounting holes and call ACK - they'll help you figure it out. (Great customer service from ACK!!!)
I am very satisfied with the selection of this product. I looked at several others and chose this one because of the ability to adjust the length of the foot braces without having to get out of the boat. I would recommend this