Carbon Express Pin Point X-Jammer 210 gr. 12 pk.. Fits Carbon Express .166" ID shafts. Size 2: 600-900 spine 110-90 gr. Size 3: 1000-1200 spine 100-80 gr. Package Contents: Carbon Express Pin Point Cone shaped point for Carbon Express X Jammer 27 Pro shafts that were designed to help eliminate deflections in hard targets. Steel construction inner chamber is tapped to accept screw point weights.