Designed by Darrin William Sirois in Fayetteville, North CarolinaBuilt by a hero, refined by an expert. Retired Sergeant Major Darrin Sirois channeled experience from 25 years of active duty into the creation of his original design. The knife world loved it. Then, renowned expert Chris Williams made several small suggestions. The revisions boosted the SiWi™ compact tactical fixed blade into a league all its own. This is collaboration at its finest.