The Sudden Impact is the production version of the popular Free Radical knife designed by Shane Sibert. This stellar knife has a modified tanto blade with a plain edge. The primary and secondary edges connect with a slight radius. The blade has a black traction coating and a slight false edge on the spine along with jimping for the thumb. The handle is G-10 with vertical grooves and hollow tubing for a distinct look. The Sudden Impact comes with a Kydex sheath that has a rotating steel clip.