How can scope rings of this quality be so affordable ? - SIG SAUER Buckmaster 1in Scope Ring Set

I recently ordered the Sig Sauer Buckmaster scope rings featured in this review, primarily due to the surprisingly low price and the quality associated with the Sig brand. After delivery and installation, I am still amazed that mounts of this superb quality were available at about a quarter of the price of other offerings. They installed quickly and securely, with the special Torx wrench included, and have thus far held my scope at absolute zero position after several trips to the range. To provide additional proof of my satisfaction, I just ordered a second set to replace the rings on my other rifle. In my opinion spending more money than the cost of these mounts is money wasted.