So, if you're looking at the C.S. Osborne Rosette Punch #139 and wondering how it stacks up against other brands, here's what our research found: it's pretty precise and durable. The manufacturer says it's CNC machined for sharp cuts and has a welded handle for stability, which makes it easy to use.

However, heads up—when it comes to thicker and firmer leathers, you might need to sharpen it a bit more at first. It's great for thinner materials right out of the box, cutting through them with just a light tap, but thicker stuff could require some extra sharpening to perform really well. This tweak helps maintain its edge across different leather types.

Some folks pointed out that while it slices through thin leather like a dream, they had to file it sharper for tougher materials. But once they did, it worked efficiently and kept its sharpness intact. One person even mentioned that it cuts cleanly through Cordura, which is a heavier, canvas-like fabric.

Compared to other brands, the C.S. Osborne punch is dependable, especially if you're working with medium to thin materials. Just keep in mind you might need to manually sharpen it if you regularly deal with thicker leather.

In the end, whether this punch is right for you might depend on the types of materials you're working with. Our research suggests it generally performs well, but you might need to do a bit of tweaking for heavier leathers.

Overall, it's a solid option for a leatherworking toolkit.

The C.S. Osborne Rosette Punch #139 is a handy tool for anyone into leatherwork, especially when you need precision. According to the manufacturer, it's got CNC-machined cutting edges that make it great for creating clean holes in different types of leather.

From what we've found, it works particularly well with softer leathers and even Cordura. One tap usually does the trick, which a lot of folks are happy about when dealing with these materials. If you've ever been frustrated by having to repeatedly hammer other punches through stubborn leather, this could be a nice change.

But here's something to keep in mind: if you're working with thicker or tougher leathers, it might need a little tweak. Some have mentioned that right out of the box, it might not be sharp enough for those sturdier materials.

One person, AJ, shared that a bit of hand-filing on the taper made it handle heavy leathers like Horween really well.

The upside? Once you've sharpened it up a bit, folks say it cuts through even the tough stuff smoothly. So, while it's pretty versatile for various leather types, just know you might need to do a bit of tuning if you're dealing with thicker materials.

Overall, with a little bit of adjusting, the C.S. Osborne Rosette Punch #139 can really do the job. Plus, it's made in the USA, which a lot of leather workers appreciate for its craftsmanship.

The C.S. Osborne Rosette Punch #139, measuring 1-1/2 inches, seems to be a hit among leather enthusiasts for its ability to create neat, round shapes. Right out of the box, it's recognized for being pretty sharp and precise, which is what you'd expect since its edges are CNC machined, according to the manufacturer's description.

Based on what we've found, people generally think it's efficient. One person mentioned switching from a less well-known brand of punch that needed several hits to cut cleanly, to the Osborne punch, which just needed one steady tap, especially on materials like Cordura (similar to canvas).

This highlights how easy it is to work with lighter materials, saving both time and effort.

That being said, when it comes to thicker or tougher leathers, some folks have found that it might need a bit of a touch-up or sharpening first. One person shared that after giving theirs a quick sharpening, it worked just fine even on Horween leather, which is pretty tough stuff.

Overall, it seems like the punch does a great job right from the start for lighter leather projects. Just a little bit of an adjustment might be needed if you're working with the thicker stuff.

So, if you're into making detailed leather creations, this punch could be a handy tool to have around.