Name: C.S. Osborne 106-12 Wing Divider — Polished Steel, 12-Inch Capacity
Brand: C.S. Osborne
Rating: 3.0 (7 reviews)

Product review

The C.S. Osborne 106-12 is a wing-style divider supplied as a single, polished steel instrument presented on a card backing for hang display. The package includes the divider itself and the preinstalled tempered spring mechanism; additional attachments are not part of the basic offering.

All moving components are machined from steel and receive a full polish. The spring is carefully tempered to allow smooth, repeatable adjustment while holding position under normal working loads. This product is manufactured in the United States.

The divider opens to a maximum radius of 12 inches, with hardened points suitable for scribing and layout on a variety of materials. Adjustment is achieved via the tensioned spring and the fastening screw at the hinge, allowing the legs to be spread and locked for consistent measuring.

Typical applications include measuring and laying out work in the insulation trade and tin or sheet-metal operations, as well as scribing on wood, paper, and metal. For users wanting pencil-tip compatibility or extreme micro-precision, alternative models or minor modifications may be preferable.

Pros

Solid machined steel construction
Tempered springs for smooth adjustment
12-inch maximum opening for large layouts

Cons

Points may require minor alignment
Fastening hardware can loosen in transit
Not supplied in a pencil-tip variant

VerdictThis wing divider is a solid, professional-grade layout tool: machined steel construction and tempered springs give it durable feel and reliable adjustment. Its 12-inch span handles large layouts common in insulation and tin work, and the polished finish resists wear. Some users report minor tip alignment issues or hardware problems during transport; those are usually fixable but worth noting if y

Reviews

julio 1/5

Damaged on arrival

Arrived bent out of shape.
Lawrence 4/5

Solid tool but minor tip misalignment

Nice instrument overall. The points don't meet perfectly when closed, which disappointed me, but it was easy to correct. Not ideal for very small circles.
Dominic 1/5

Never got to try it

I packed it into my tool bag but when I went to use it the locking nut was missing.
Carlos Del Hierro 1/5

Screws loosen in transit

The fastening screw tends to back out during transport. I'd suggest a sturdier model for heavy use.
Nicholas Bohurjak 4/5

Excellent material, precise hold

I wish there were a pencil-compatible version. The steel is excellent and it holds precisely for scribing wood, paper, and sheet metal.
joseph williams 5/5

Five-Star quality

These are my favorite dividers; I recommend them to anyone needing a high-quality layout tool.
carlos 5/5

Divider for insulation work

I work as an insulator and hesitated because of the cost, but I have no regrets—it's the finest divider I've owned.