It's carbide, so it will do its job for a very long time.
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![Image](http://www.kmshooting.com/images/products/med_908603451.jpg)
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Web site is here: K&M Shooting.
The company used to be a benchrest specialty store, but their products got widely noticed and the original owner sold his outfit rather than get overwhelmed. A few years ago their customer service was exceptional. I dropped one of their case holders on a concrete floor and broke the steel stem. They replaced it free of charge. (That's sort of like GM fixing your Chevy pickup for free after you run it into a tree.) I hope the new owners are as thoughtful.
--Bob