The 4th Degree of the Knights of Columbus is an optional degree. It is, however, the most visible arm of the Order as these "Sir Knights" wear their distinctive regalia - tuxedo, chapeau, cape and sword - while performing as a color guard or honor guard at various church and civic functions. The principle of the 4th Degree is Patriotism; respect for the nation and its symbols and good citizenship are emphasized at all 4th Degree meetings or ceremonials. 

To become a 4th Degree Knight, a 3rd Degree member must have been a Knight of Columbus for one year and must be a U.S. citizen. While the tuxedo with social balderic is required for the 4th Degree exemplification and worn for certain social events, purchase and wear of the regalia is strictly optional.

The Sir Knights of Assembly #1098 represent Councils in San Angelo, Eldorado, Sonora and Wall. Fr. Serran R Braun Assembly #1098 meets at 7:00 p.m. each third Monday of the month at the Knights of Columbus Hall, 3636 North Bryant Blvd.