The T4 simply replaces your existing nock in any shaft with a uni-bushing system and will press fit into standard carbon shafts. The T4 works with all styles of arrow rests and can be tuned by simply.turning the nock until the vanes or feathers clear. Use the T4 with compound bows, recurves and longbows with either a release or fingers. The T4 will stabilize target and field points, mechanical and fixed blade broadheads. Available in Green, White & Orange. For smaller diameter carbon.