Herman Knives strives for perfection in every aspect of its work. The same philosophy guided us when selecting sharpening stones that would ensure not only a perfectly sharp edge but also the long-term preservation of that sharpness. After extensive testing and comparison, we found the ideal solution — PD Tools sharpening stones, created for the highest level of precision. These are the exact models we use at Herman Knives, and the grit options available at Polish Custom Knives are those we recommend for maintaining and caring for our knives in perfect condition.
PD Tools stones are industrial-grade tools originally designed for professional, commercial use — in manufacturing plants, tool workshops, and precision craft facilities. Today, they are available to specialists and enthusiasts who want to achieve the same professional results in their own workshops or home sharpening setups.
PD Tools (Poltava Diamond Tools) is a European manufacturer of high-purity diamond and CBN (Cubic Boron Nitride) abrasives. Founded in 1966, the company has spent decades developing advanced abrasive technologies used in precision industries. Their product range includes sharpening stones, grinding tools, segments, and discs for working with metals, powdered steels, ceramics, glass, and other demanding materials.
Each PD Tools stone utilizes diamond or CBN grains with a purity level exceeding 99.9%, uniformly distributed within the bonding structure using Uniform Bond technology. This ensures consistent performance, long-term stability, and efficient cutting action throughout the stone’s lifespan. PD Tools stones maintain their flatness and cutting efficiency even after prolonged use.
Exceptional flatness tolerance of up to 0.01 mm guarantees a stable sharpening angle and perfectly symmetrical edge geometry. Every stone works smoothly, without vibrations or the need for frequent flattening. They can be used dry or with a small amount of mineral oil (e.g., KAZAK), always ready for precise work.
The result is faster, more controlled edge formation with a polished-like finish. PD Tools are designed for those who expect repeatable, precise, and fully controlled results — the same standard trusted in the workshop of Herman Knives.
The PDTools EXPERT PRO series represents the highest level of precision finishing stones, created for those who demand perfect edge refinement and mirror-level polishing. Built on a foundation of industrial technology, these stones use high-purity CBN (Cubic Boron Nitride) abrasive with a carefully engineered ceramic–resin bond, ensuring unmatched smoothness and control during ultra-fine sharpening.
The 3000 GRIT model is designed for final edge finishing and pre-polishing, delivering an extremely clean and uniform cutting surface. It removes the smallest burrs, perfects symmetry, and leaves the edge with a bright, polished appearance — ideal for high-performance knives and precision tools.
Abrasive: CBN (Cubic Boron Nitride)
Bond: Advanced ceramic–resin
Grit: 3000
Working layer thickness: 3 mm
Stone dimensions: 150 × 25 × 3 mm
Overall size (with blank): 160 × 25 × 6 mm
Compatibility: TSPROF, KME, Edge Pro, Kazak, Hapstone, Blitz, and other guided systems
Use: Dry or with minimal lubrication
Used by Herman Knives as part of the final edge-finishing process, the PDTools EXPERT PRO 3000 GRIT stone delivers a flawless, mirror-ready surface and ultimate sharpness. It is a professional-grade tool for those who pursue perfection — where precision meets artistry.
PDTools is a European manufacturer of professional abrasive tools, specializing in high-purity diamond and CBN sharpening stones. Founded in 1966 in Poltava, Ukraine, the company has spent more than half a century developing technologies for precision industries — from metal and powdered steel processing to ceramics and glass.
All PDTools stones are made using abrasive grains of over 99.9% purity, evenly distributed within the bond structure through Uniform Bond technology. This ensures consistent performance, long-term stability, and precise, repeatable results. The manufacturer maintains a flatness tolerance of 0.01 mm, guaranteeing an accurate sharpening angle and perfectly symmetrical edge.
As part of PDT GROUP, PDTools supplies its products to more than 70 countries worldwide and operates under a certified ISO 9001:2015 quality system. Trusted by Herman Knives, PDTools stones combine industrial-grade precision with the craftsmanship demanded by the finest knife makers.
