100% Carbon shaft is lightweight to reduce fatigue and joint strain and very durable. Mid-sized, fiberglass reinforced blades allow for a smooth, flutter free forward stroke. The Sting Ray Hybrid offers the Posi-Lok ferrule system which clicks into position firmly and securely featuring strong, corrosion-free composite construction, convenient dual-button release, and infinite feathering angles. Licensed Ferrule US Patent No. 6,881,111.