1 Heavy-Duty Roofing Shark Knives by XINDAO-1 include a total of 6 fixed blades per set, made of durable aluminum and alloy steel. Each knife has a blade length of 5 centimeters and a green color. The hand-powered roofing knives are designed for easy handling and cutting through roofing materials. With a special bend feature, these knives offer precision and efficiency for any roofing project. Each set comes with a variety of included components for different cutting needs. The compact size and lightweight design make these roofing shark knives a convenient and reliable tool for professionals and DIY enthusiasts alike.