Based on our own experience, this tool is a complete waste of money. The quality is absolutely terrible and the tool is completely unreliable. The product is marketed as professional-grade, but it feels more like a child's toy. The only positive thing I can say is that it arrived on time. However, its ineffectiveness makes it not worth the price.
Pros
Delivered on time.
Cons
Terrible quality, unreliable, not worth the price.
I like this gauge because it measures both convex and concave welds. It also helps determine the clearance that may be required for butt welding. Yes, it has a screw cap, but other than that it's a good caliber. When used in conjunction with angle gauges, this is all you need to measure welds.
This is a good general purpose sensor for field use. However, the description is misleading as it refers to a "lock finger button". While it's more like a "fingerwheel" that lets it twist and turn to lock. There is a manufacturer that makes the same sensor with a grip - which I think is more convenient and faster. Also be careful - no case or case is included! I think that's a disadvantage. How does the manufacturer expect you to wear it? The device isn't exactly cheap - and for such a price…