Let me start by saying the 5-in-1 Sliding Gauge by Nancy Zieman is grossly overpriced. According to the package, this notion has five uses:
1. Spacing and marking buttonholes:
2. Seam Allowance Gauge
3. Hem Gauge
4. Circle compass
5. “T” Gauge
The 5-in-1 Sliding gauge functions like most other seam/hem gauges, only better. Both the "T" top and the movable ruler are extra long allowing you to make marks anywhere along it's length. That comes in handy when drawing guidelines for buttonholes. In addition, the gauge locks in place and does not move until you press the button. There is a slot down the center so you can mark ¼" seam allowances and the gauge itself is 5/8 " wide. The slot opening is 1/8" wide. The clear plastic circle acts as a hub and the gauge rotates around it for drawing circles.
The design is quite clever and Nancy Zieman has to get her cut, but why spend $15 on a hem gauge? Because, I'm a sucker for sewing gadgets, that's why. This really proves it. And I bought this on a day when I had a few extra dollars no sales resistance. I've managed to sew for more than 30 years without this little tool. But now that I have it, I'm sure I'll use it quite frequently, so in that way, it's worth every penny.
PS: Click here to see a video demonstrating the many uses of this tool.