Massive heavyweight knock-down energy. Trailblazer 150grain Mechanical broadheads create all the knock-down power to take down the largest game, while creating bigger and faster blood trails. Features: Designed for crossbows up to 500fpsUltra-strong aluminum and stainless steel constructionFlatter trajectory with zero planning and less wind dragNo O rings or rubber bands. Will not open in-flight Excalibur EXPERT SERIES Trailblazers 150gr Mechanical Broadhead 3pk 6676