Yep, they are expensive - that's that out of the way.
Starrett No.92 dividers combine the rugged durability of a traditional wing divider with the precision of a bowspring divider; the best of both worlds.
The removable point is the same size as a pencil so they function as both compasses and dividers; one tool instead of two.
The point is extendable and the wing covers a 120 degree arc rather than the usual 60; so even with a 9" leg you can lay out a full 32" (810mm) diameter tabletop or step off 1/4" (6mm) jewellery box dovetails.
The legs are forged and ground, much the same process as a handmade chisel; this makes them wonderfully rigid so they hold their setting beautifully and the points hold their sharpness.
A spring loaded adjuster provides fine tuning without interfering with the coarse setting; so they can be used quickly or accurately with equal ease.
The removable point (the one that does all the work) can be mounted in a drill for easy and accurate sharpening, or reground to a radiused knife edge for cleaner lines.
They may be a bit more than you expected a pair of dividers to cost, but in our opinion they are worth every penny.