T Track Bolts Question

Newbie here, forgive me!!

I have added some Rockler T Trak to a countertop / workbench I am making. Honestly I just wanted to mess around with the T Track, hold downs etc.

My question is, does anyone make a bolt for the T Track that you can insert in the middle of a run of track, then turn 1/4 turn, and clamp down with the knob or jig or whatever. I figured the T Track bolts worked this way, but the bolts I have don’t – I have to slide the bolt in from one end, the run it all the way down the track to wherever I want the clamp. I have a 16 foot run of track, maybe I should have investigated how T Track works first!

Any help or insight appreciated. When I was working in theatre lighting we had basically the same thing upside down on the ceiling, but we could slide the bolt (nut technically) in the track, then make a 1/4 turn and it would engage the rails, then tighten it down. I can’t recall what that track was called——Ahh – Unistrut.
Jef

If I have not explained what I thought the bolts would do, let me know.