For Gargraves track. This is for those hard to reach places where you need to hold down the track at the tie end. I built two 5 track Bascule Bridges and the only place to hold down the Gargraves track was at the ends of each tie.
This hold down ties down two ties at a time. It has 1/8" diameter holes for Gargrave screws with an inset so the screw head is flush.