PORTABLE KNIFE SHARPENING - Perfect knife sharpener for field, home or shop use. ANGLE GUIDES - 20° on the 320 grit diamond plate and a 25° on the fine ceramic rod. COMPACT AND PRECISE DESIGN - Makes it easy to carry so you can sharpen anytime, anywhere - with speed and ease. NO ASSEMBLY - All elements are self-contained and require no set up or assembly in the field. PROUD TO BE AN AMERICAN COMPANY - Work Sharp is a 4th-generation family owned company in Ashland, Oregon. For over 40 years we have been engineering industry-leading sharpening tools here in the USA.