The Pink Arrow Project signature broadhead with proceeds going to help find a cure for breast cancer. Innerloc's revolutionary Blade Alignment Technology BAT finally lets you precisely tune broadheads to your carbon arrows. The ultimate Innerloc: the Carbon Tuner has all of the great features you have grown to love. They also have stronger .027" blades, BAT technology and classy "Blood Trial" anodizing. The perfect tuning solution for your carbon arrows. 1 1/16" cutting diameter 100gr.