Are these the biggest spring bars

I just swapped my Tuna onto the bracelet and this is the strap next to my CW Dartmouth. I hope I never need to get new spring bars as they fit snug in that hole.

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Not super familiar with the Kinetic Drive Seiko's, but my guess would be it uses the Seiko Fatbar style. Basically an Uber beefy, shoulder less spring bar.