These star drive shoulder screws are perfectly sized to snugly fit the holes in VEX metal. These screws allow you to build straight and square structures easily. Great for VEX beginners and pros alike. Available with different shoulder lengths to perfectly fit the thickness of various numbers of aluminum and steel structure pieces. Variety pack includes 100pcs of all 8 sizes of shoulder screws and 300pcs of Large Washers to fit over the shoulder Color coded by length for easy sorting T15 Star Drive Shoulder diameter of 0.176″ fits snugly in VEX metal. Use Large Washers to fit over the shoulder
