Each package contains 3 SQ300 nocks of your color choice. (HD-orange for now) Designed specifically for Scorpyd crossbows, the SQ300 delivers a secure, repeatable connection between bolt and bowstring. The snap-on profile installs easily on .145" serving diameter, giving you the confidence that your bolt is correctly seated every time. Constructed from fiber-filled polycarbonate, the SQ300 offers improved impact resistance and long-term durability—so you can depend on consistent performance shot after shot. This nock fits .300" ID shafts ( Black Eagle, Lumen-Arrows, Victory X Bolts, Gold Tip Swift, Ballistic and Superfly)