0.166 Series: Micro Diameter Hunting Arrow consists of 100% Carbon Fiber Construction for Maximum Speed and Penetration with Less Wind Deflection; MAXX KE Technology: Advanced 3K Carbon Weave for Less Torque, Faster Recovery of Arrow Flight, and Tighter Uniform Spine Consistency; Spine Aligned: Every Arrow Digitally Spine Aligned For Increased Accuracy and Shot to Shot Consistency; Matched Weight: Each Dozen Weight Matched to +/-0.5 Grains for Precise Shot Consistency and Tighter Groupings; Advanced Nano Ceramic Arrow Coating Improves Penetration and Allows for Easy Removal from Targets; Hand Fletched For Optimum Vane Adhesion and Alignment