Spline Drive Breech Lock Bushing 4 pack

Maybe it's just my old fingers, but I like these better than the ones with the O-ring. The O-ring version takes a bit of force to get the die to start moving in the bushing and then gets a bit easier. With these, there's no initial friction to overcome. You just loosen the locking screw, spin the die whichever way it needs to go. and re-tighten the screw.

My only complaint (which really isn't a complaint) is that you can't order them in one color. For instance, I get 3-die rifle sets. That means I use the red, blue, and gold bushings. I then have a left-over silver (white) bushing. The silver bushing is on the powder through expanding die for 4-die pistol sets, so I use the silver on the long and short rifle powder charging dies, but I only need so many of those.

Additional colors would be great to distinguish other dies: Neck resizing, Quick Trim, etc.

Do not hesitate to by these. The locking screw is the way to go. They lock solid with just a light twist of the Allen head bolt and you can make small die adjustments very easily. The need for a lock ring is completely gone.
I cannot recommend them enough. I would like to see more colors offered for trim dies, collet sizing dies, bullet sizing, etc.