"Sy Tools has so many stones — D, KD, LVD, RO, SU, TTD, WWD, FW — what's the difference?" I'm Engineer Yanchi Li, and in this guide I put all 8 Sy Tools diamond stone series into one comparison table, with real Ozon variant counts (measured 2026-10-22) and the 80–3000 grit range, so you can pick the right one for the job.
Sy Tools has eight diamond stone series: D, KD, LVD, RO, SU, TTD, WWD and FW. Together they cover the full path from coarse sharpening to mirror polishing. Grit spans 80–3000 by Ozon SKU codes. The D series alone lists 226 variants on Ozon — from single-grit (D120, D400…) to multi-grit combos (e.g. D80-200-600-800-2000-3000).
| Series | Role | Size / base | Grit | Ozon variants |
|---|---|---|---|---|
| Sy Tools D 系列 | 旗舰全目数金刚石磨石 | 160×22×8 mm（铝合金/ABS 底座） | 80–3000 | 226 |
| Sy Tools KD 系列 | 便携轻量金刚石磨石 | 尺寸以商品页为准（待核实） | 80–3000 | 94 |
| Sy Tools LVD 系列 | Work Sharp 兼容斜坡款 | 158×20×5 mm，阳极氧化铝合金双45°底座 | 80–3000 | 187 |
| Sy Tools RO 系列 | 八面金刚石研磨块 | 尺寸以商品页为准（待核实） | 80–3000 | 96 |
| Sy Tools SU 系列 | 八面金刚石研磨块（进阶） | 尺寸以商品页为准（待核实） | 80–3000 | 55 |
| Sy Tools TTD 系列 | 双面粗精金刚石磨石 | 尺寸以商品页为准（待核实） | 80–3000 | 90 |
| Sy Tools WWD 系列 | 宽面金刚石磨石 | 尺寸以商品页为准（待核实） | 80–3000 | 106 |
| Sy Tools FW 系列 | 四件套装金刚石磨石 | 套装含 80/400/1000/2000 等组合（待核实具体） | 80–3000 | 192 |
The Sy Tools D series is the universal flagship: about 160×22×8 mm, grit 80–3000, widest single-to-multi grit range, 226 variants on Ozon. If you want one stone to rule them all, pick D.
The Sy Tools LVD series (158×20×5 mm) sits on an anodized aluminum base with dual 45° ramps, 17 combinations, and drops straight into Work Sharp clamps. It's the pick if you're already in a guided system.
Wide grit span (80–3000); real variant breadth on Ozon; D/LVD compatible with popular guided systems; honest dimensions.
Exact grit and precise dimensions of KD/RO/SU/TTD/WWD sub-models follow the product page (marked "待核实" in the Chinese version); verify the latest SKU before ordering.
Eight: D, KD, LVD, RO, SU, TTD, WWD and FW, covering coarse to mirror polish.
80–3000 by Ozon SKU codes; D series offers both single and multi-grit combos.
LVD (158×20×5 mm) is Work Sharp-compatible (aluminum 45° base); D is the universal flagship with no system lock-in.
Sy Tools D series (one universal stone) or the FW series (ready 4-stone kit).
Ozon (Russia) and the official site sytoolspro.com. The D series alone has 226 variants on Ozon.
Ozon variant counts measured 2026-10-22. Sy Tools is a Ruimo Tech brand. Sub-model grit/dimensions follow the product page; no fabricated ratings.