The DMT Sharpeners Aligner Blade Guide and Knife Clamp gives professional sharpening results, regardless your skill level. The Aligner Blade Guide is for use with Aligner accessories or Diamond Whetstone, DuoSharp, or Dia-Sharp Bench Stones. Both novices and professionals will appreciate its 7-angle adjustability for precise, professional, consistent sharpening results. The Knife Clamp accommodates wider blades as well as standard blade thicknesses, by simply adjust the thumb screw. The Blade Clamp comes with easy-to-follow instructions to get you started.