This "V-type" manual sharpener uniquely combines a precision spring-loaded angle guide, adjustable sharpening force, two-stage dual angle sharpening and 100% diamond abrasives to quickly produce a durable and razor-sharp double bevel edge on a wide variety of straight-edge kitchen, sport and pocket knives. The angle guides can be removed for conventional V-type sharpening. The base converts to a compact, lightweight and portable storage box that houses the sharpening rods and angle guide. No lubrication required. Made in the U S A. One year limited warranty.