套筒。本身不是完整刀座，而是把刀具或鑽夾頭轉接到機台既有孔位的過渡件，外徑配機台、內徑配刀具。
對應 Tsugami 料號 3281-Z79055-0302。本款不使用夾頭，刀具直接夾持；最大刀柄 20.0 mm；刀座柄徑 35 mm。
Mongtec Precision 為台灣品牌，台中設計製造。
| Mongtec model | 3281-Z79055-0302 |
|---|---|
| Machine brand | Tsugami |
| Tsugami reference code | 3281-Z79055-0302 |
| Holder type | Sleeves |
| Max tool shank | 20.0 mm |
| Holder shank diameter | 35 mm |
| Collet | — (no collet; tool clamped directly) |
| Drive | Static (not driven) |
| Max speed | — |
| Brand | Mongtec Precision Inc. — Taiwanese brand, designed and engineered in Taichung, Taiwan |
| Model | Type | Max tool shank | Collet | Drive |
|---|---|---|---|---|
| 3268-T051 | Axial toolholders | 10.0 mm | ER16 | 1:1 · 6,000 rpm |
| 3281-S080 | Axial toolholders | 10.0 mm | ER16 | 1:1 · 8,000 rpm |
| 3281-Z79098 | Axial toolholders | 10.0 mm | ER16 | 1:1 · 8,000 rpm |
| 3281-Z74045-0100 | Axial toolholders | 10.0 mm | ER16 | 1:1 · 6,000 rpm |
| 3282-Y041 | Axial toolholders | 10.0 mm | ER16 | 1:1 · 6,000 rpm |
| 3220-Y7072 | Axial toolholders | 10.0 mm | ER16 | 1:1 · 6,000 rpm |
| 3282-Y901 | Radial 4 spindles toolholders | 10.0 mm | ER16 | 1:1 · 6,000 rpm |
| 3290-Y041 | Radial offset toolholders | 10.0 mm | ER16 | 1:1 · 6,000 rpm |
| 3281-Y461-9010 | Radial offset toolholders | 10.0 mm | ER16 | 1:1 · 8,000 rpm |
| 3282-Y212 | Sleeves (internal coolant) | 25.0 mm | — | Static |
| 3282-Z71051-9010 | Static drilling toolholders | 10.0 mm | ER16 | Static |
英文版：English version · 走心式刀座總覽 · 動力刀座 · 靜態刀塔刀座