Common on Necky Kayaks, as well as Modern Ocean Kayak and Old Town kayaks made by Johnson. This style of foot peg has been in use by Necky Kayaks since the 1990s. This Johnson brand foot pad, for rudder slides in a plastic rail (aka track). It may be fitted with a strap and super lock for leg adjustment. The strap connects to the control cable. Foot brace is 7 ¾ inches long, 1 ¼ inch wide. Left and right are the same. The photo below shows the non-rudder foot peg option with trigger.