Bone Evading Advanced Spring Technology (BEAST): Features blades that retract and redeploy when encountering bone, preserving sharpness and kinetic energy for unmatched penetration. Fastest Opening Blades: Capable of deploying at speeds over 940 mph, ensuring quick and effective impact. Premium Materials: Incorporates German LUTZ blades with superior edge retention and a durable 7075 Aluminum ferrule, designed for high performance and accuracy. Innovative Blade Retention System: Utilizes a band-free, collar-free design with stainless steel locking components to eliminate noise and ensure reliability. Designed for Versatility: Compatible with crossbows and effective with lower poundage bows, assembled and rigorously tested in the USA. Specifications: Construction: 7075 aluminum ferrule, stainless steel blades Number of Blades: Two Cut Diameter: 2.3” Blade Thickness: .035” Weight: 100 and 125 grains Quantity: 3-pack