Boride T2 Series 4-Stone Boxed Set 6" x 1" PPA

Boride T2 Series 4-Stone Boxed Set for WorkSharp PPA includes four aluminum oxide sharpening stones: F220, F400, F800, and F1200 grit. The progression covers sharpening through fine edge refinement with the Work Sharp Professional Precision Adjust knife sharpener.

The included storage box has seven slots: four for the T2 stones and three spare slots for additional stones or strops. The box may be supplied in either of two slightly different designs.

T2 Series stones have a hard vitrified bond and slow breakdown, helping them retain their shape during sharpening.

Each stone is 3mm thick and mounted on a steel blank in the PPA form factor. The stones have no side engraving.

The ferromagnetic blanks attach 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 grit progression.

The stones can be used with water or honing oil. When using water, wipe the steel blanks completely dry after use.

Note. Boride T2 stones differ in thickness from the abrasives supplied with the Work Sharp Professional Precision Adjust. Always check the sharpening angle when switching between the T2 stones and the original abrasives, and adjust it as needed.

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.

Oil Behavior

Oil Behavior describes how a sharpening stone interacts with oil during use. The property is especially important for vitrified and resin-bonded stones because oil can either remain on the working surface or be absorbed into the stone body. Oil behavior affects sharpening feel, swarf evacuation, loading tendency, maintenance, and long-term stone cleanliness.

Oil-retentive stones keep a stable lubricating film on the surface during sharpening. This improves swarf mobility, reduces surface drying, and creates a smoother, more consistent sharpening feel. Oil-retentive stones are suitable for long-term use with honing oil.

Oil-wicking stones rapidly absorb oil into the internal structure through capillary action. The working surface dries quickly, swarf removal becomes less efficient, and oil contamination may become difficult or impossible to remove completely. Oil-wicking stones are generally better suited for water-based sharpening.