Our Lacrosse Pedigree: Tactical Alloys is continuing to optimize the “Sub5Attack” (attack shafts less than 5 ounces) and “Sub13Defense” (d-poles less than 13 ounces), models that were very successful under the banner of Tri-Kor Alloys. The founder of Tactical Alloys and Tri-Kor Alloys is the original inventor and alloy developer for Scandium Alloys, including the first lacrosse shafts patented and produced in the U.S.