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Hapstone Optimal
USD 13.00
Grit
Hapstone USA
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Hapstone Optimal Sharpening Stones Reliable water stones for controlled sharpening of EDC, kitchen, and outdoor knives up to 62 HRC. Abrasive Aluminum oxide Hapstone Optimal stones
use aluminum oxide abrasive with a vitrified bond for stable sharpening performance. Use For everyday knives Designed for sharpening EDC, kitchen, and outdoor blades with steel hardness up to 62 HRC. Result Controlled metal removal The stones provide an even scratch pattern, low clogging, and fast, controlled steel removal. Use and maintenance Water only. No oil. Soak the stone for 2–3 minutes before use and spray water during sharpening when needed. Use water only. Oil is not recommended for these stones. The stones are easy to clean, pre-lapped, and ready to use. Grit conversion FEPA, JIS, and micron reference Use this chart to compare Hapstone Optimal FEPA grit ratings with approximate JIS and micron equivalents. Open grit conversion table + FEPA JIS Microns F220 #250 50 µm F400 #600 20 µm F500 #1000 10 µm F1000 #3000 5 µm F1200 #4000 3 µm Specifications Working surface6” × 1” (150 × 25 mm) Stone thickness0.28” (7 mm) Blank size6.3” × 1” × 0.12” (160 × 25 × 3 mm) Total size6.3” × 1” × 0.39” (160 × 25 × 10 mm) AbrasiveAluminum Oxide BinderVitrified Working withWater Country of originUkraine Stone typeStone mounted on a 45° beveled blank .r2-case-apple{color:#191919;line-height:1.5} .r2-case-apple *,.r2-case-apple *::before,.r2-case-apple *::after{box-sizing:border-box;font-family:inherit!important} .r2-case-apple img{display:block;width:100%;height:auto;border:0;border-radius:24px} .r2-case-apple section{margin:0 0 20px} .r2-hero{text-align:center;padding:12px 0 4px} .r2-hero-copy{max-width:760px;margin:0 auto 18px} .r2-hero-media{max-width:520px;margin:0 auto} .r2-hero h1{margin:0 0 12px;font-weight:700;letter-spacing:-0.02em;font-family:'Montserrat',sans-serif!important} @media(min-width:575px){ body .r2-case-apple .r2-hero .r2-hero-copy h1.hero-text{font-size:36px!important;line-height:50px!important} } .r2-subtitle{max-width:720px;margin:0 auto;font-size:19px;line-height:1.4;color:#6e6e73} .r2-case-apple .r2-feature-card p.r2-card-label, .r2-case-apple .r2-split-copy p.r2-card-label, .r2-case-apple .r2-dark-copy p.r2-card-label, .r2-case-apple .r2-accordion-copy p.r2-card-label{ margin:0 0 8px; 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