Thanks to Tazmic Enterprises
Jaime Hernandez: In 2005 the U.S. Mint introduced a Satin Finish Uncirculated Coin Set which gave the coins a special satin like appearance. Coins were struck with sandblasted dies and in burnished coin blanks. The Satin Finish coins were only struck from 2005 - 2012.
Most examples came in really good quality with most examples grading about MS67-MS68 condition. Nicer examples graded MS69 while very few achieved the MS70 grade.