Carbon Express Pin Point LineJammer Pro 150 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 Line Jammer Pro shafts that were designed to help eliminate deflections in hard targets. Steel construction inner chamber is tapped to accept screw point weights.