Boride Mixed Series 4-Stone Boxed Set [6" x 1" PPA]

Boride Mixed Series 4-Stone Set for WorkSharp PPA combines four aluminum oxide sharpening stones with an emphasis on tool steels: AM-8 F220, Orange EDM F400, T2 F800, and AS-9 F1200. The progression covers initial sharpening through fine edge refinement with the Work Sharp Professional Precision Adjust knife sharpener. The set alternates harder and softer bonds through the progression: harder AM-8, softer Orange EDM, harder T2, and softer AS-9. This selection combines the shape retention of the harder stones with the more readily renewing abrasive surfaces of the softer stones. AM-8 F220 starts the progression with a hard structure, slow breakdown, and good shape retention. Orange EDM F400 follows with extra-sharp aluminum oxide grain for fast, consistent cutting and further bevel refinement. T2 F800 continues edge refinement with a hard bond and slow breakdown. AS-9 F1200 completes the progression with a softer structure and smooth cutting action for the final fine-abrasive stage. The stones are mounted on ferromagnetic steel blanks in the PPA form factor, attaching directly to the magnets in the original PPA stone holder. Alignment holes engage the holder's locating tabs to position each stone and keep it stable during use, allowing quick changes through the progression.