It’s a Knockout in more ways than one. The Knockout (#1870) looks great, but the reason it bears this name is that we’ve “knocked out” a piece of the aluminum handle and inset a stainless-steel plate to create a frame lock that we’re calling a Sub-Frame Lock® You get the lightweight benefits of anodized aluminum handles and the strength of a steel frame lock with integral lockbar stabilization. The Knockout also features SpeedSafe® assisted opening. It’s equipped with our new deep-carry clip and is drilled for quad-carry: tip-up, tip-down, left- or right-handed. Made in the USA. Since the company"s founding in 1974, Kershaw Knives has been dedicated to quality. This has led to a worldwide reputation for performance and innovation in tools and knives. From state-of-the-art manufacturing to advanced materials, customers rely on Kershaw for products that provide "technology with an edge". Today, Kershaw is a wholly-owned subsidiary of Kai Corporation, which has been in business for more than 90 years. Kai Corporation is Japan"s premier blade producer. Their innovative approach to product development has resulted in more than 10,000 superior products. Kershaw products are guaranteed for the lifetime of the original owner to be free of defects when received from the factory. Any product we find to be defective in its original material, construction, or workmanship will be repaired or replaced with the same item or one of equal value at no charge. Normal wear, abuse, or neglect are excluded from this non-transferable warranty. For warranty service, please return product via UPS or insured mail. Include your name, address, telephone number, proof of purchase (sales slip) and a short explanation of the warranty service requested to Kai USA Ltd. 18600 SW Teton Avenue, Tualatin, OR 97062.