How to Choose Boride PPA Sets
Boride PPA sets offer two four-stone progressions for the Work Sharp Professional Precision Adjust knife sharpener. Choose T2 for an all-around set with an emphasis on stainless steels, or Mixed Series for a selection focused on tool steels.
| Set | Included Stones | Bond Hardness | Best For |
|---|---|---|---|
| T2 Series | T2 F220, F400, F800, F1200 | Hard throughout | All-around sharpening with an emphasis on stainless steels; consistent series characteristics through the progression |
| Mixed Series | AM-8 F220, Orange EDM F400, T2 F800, AS-9 F1200 | Harder–softer–harder–softer | Tool steel sharpening; a combination of shape-retaining stones and more readily renewing abrasive surfaces |
