I ran one for several years. No problems at all. I've use two different engine builders over the last 3 years and both told me to use the composite instead of the old style brass gear.
Fits Chevy of course. It's been in my tool box for a year and I remember it did have some wear, but if it weren't reusable I'd have probably thrown it away. I still have it, send me your info and I'll mail it to you.