Hapstone RS Ultra Knife Sharpener

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Hapstone RS Family The most complete RS system. Hapstone RS Ultra is the maximum configuration in the Hapstone RS family — a fully equipped sharpening system with two pairs of Smal l Universal Angled Clamps, case, digital angle gauge, Precise Angle Adjuster, and Advanced Stone Holder already included. Hapstone RS Ultra — Package Update Configuration changes effective June 1, 2026 Until June 7, 2026 After June 8, 2026 Included Until June 1, 2026 After June 1, 2026 Base Hapstone RS ✔ ✔ Rotating Clamp Module ✔ ✔ Clamps Hapstone RS ClampsSmall Universal Angled Clamps Small Universal Angled Clamps(2 pairs) Advanced Stone Holder with Linear Bearing ✔ ✔ Stopper ✔ ✔ Precise Angle Adjuster for Hapstone RS ✔ ✔ Case for Hapstone RS ✔ ✔ Digital Angle Gauge ✔ ✔ Ball-End Hex Screwdriver (3 mm) ✔ ✔ King Size Sharpie Marker ✔ ✔ Stickers Hapstone ✔ ✔ WHAT’S CHANGED After June 1, 2026, the RS Ultra configuration replaces the previous RS clamp set with an additional pair of Small Universal Angled Clamps, giving the package two pairs of Small Universal Angled Clamps for improved versatility and support for different blade geometries. Maximum configuration Everything you need in one case. Hapstone RS Ultra is the most complete configuration in the Hapstone RS lineup. It includes key upgrades, two pairs of Small Universal Angled Clamps, measuring tools, and a storage case from the start. Ready now No need to build the setup later. This is a fully equipped system here and now — designed for users who want broad sharpening coverage and a premium out-of-the-box experience. Clamp versatility Two pairs of universal angled clamps. RS Ultra includes two pairs of Small Universal Angled Clamps. This setup provides stable knife holding and broad compatibility with different blade shapes, from thin utility knives to everyday kitchen blades. Precision Fine angle control included. The Precise Angle Adjuster for Hapstone RS helps make small angle changes faster, easier, and more repeatable during sharpening. Storage All essentials in one case. The included case helps keep the system and accessories protected, organized, and ready for transport or storage. Why RS Ultra Maximum RS package. Minimum compromises. Hapstone RS Ultra is built for users who want the most complete RS setup from the beginning. With two pairs of Small Universal Angled Clamps, advanced stone holder, precise angle adjuster, digital angle gauge, and case included, it is the flagship configuration of the Hapstone RS family. Most complete RS setup The maximum configuration in the Hapstone RS family, assembled for broad functionality right out of the box. Universal clamp setup Includes two pairs of Small Universal Angled Clamps for wider sharpening coverage. Premium accessories included Case, digital angle gauge, precise angle adjuster, advanced stone holder, marker, screwdriver, and spare screws. Ready to work A strong all-in-one solution for users who want a complete system instead of adding upgrades step by step. Sharpening range Designed for many types of knives. The Hapstone RS system is designed to handle a wide range of blade sizes and thicknesses. It can sharpen knives from 40 to 230 mm in length and up to 6 mm thick. What’s included Full kit contents. The delivery pack contains everything you need to start sharpening immediately, including premium RS accessories and storage. Core system 1 Platform1 Rotating Clamp Module for Hapstone RS1 Advanced Stone Holder with Linear Bearing for Hapstone RS Clamps 2 pairs of Small Universal Angled Clamps for Hapstone RS Adjustment & Measurement 1 Precise Angle Adjuster for Hapstone RS1 Digital Angle Gauge Hapstone1 Stopper Accessories 1 Case for Hapstone RS1 Ball-End Hex Screwdriver (3 mm)Spare Clamp Screws1 King Size Sharpie MarkerHapstone stickers Technical details Specifications System Hapstone RS Ultra Configuration Maximum configuration of the Hapstone RS family Weight 88.18 oz (2.5 kg) System Size 11" × 5.5" × 7.4" (280 × 143 × 188 mm) Minimum Blade Length 1.6" (40 mm) Maximum Blade Length 9.1" (230 mm) Maximum Blade Thickness 0.3" (6 mm) Sharpening Angle Range 12° to 30° Stone Compatibility 6" × 1" (150 × 25 mm)4" × 1" (100 × 25 mm) Maximum Number of Clamps 4 Base Heavy 8 mm steel base with silicone feet Materials Aircraft aluminum, stainless steel guides, steel base Sharpening Stones Not included Warranty 5 years Note: Sharpening stones are not included. 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