I tried one. Junk. The metal is very soft, it didn't feed reliably or lock the slide back.
Save your money and get the Chip McCormick 10-rounders CDNN has for
$15. I tried one of each figuring I'd order a pair of which ever I liked best (I like cheaper best if it works). The CMC worked in both of the 1911s I tried.
I also had no problems with CDNN's KRD 17-rnd HiPower mags so I thought these worth a try, but IMHO, forget about these.
--wally.