The Smith & Wesson First Responder Black Magic Assisted Knife has a 3.4 inch blade and a 4.8 inch handle. It has a nylon fiber handle. The total weight is 4.9 ounces. It features a spring loaded glass breaker. It is made of 4034 stainless steel.WARNING: Cancer and Reproductive Harm – www.P65WARNINGs.ca.gov.