特性：自动快速回程机构设计，大大减轻劳动强度。
用途：用于螺栓螺母安装拆卸。
| 型号 Model | 螺 纹 Thread D1 | 螺母对边 The Edge Of The Nut | 拉伸力 Tensile Force KN | 2 | D3 mm | H1 | H2 nm | H3 mm | |
| MSD 20 | M20×2.5 | 30 | 200 | 44 | 59 | 6 | 19 | 182 | |
| MSD 24 | M24×3 | 36 | 290 | 51 | 65 | 8 | 24 | 188 | |
| MSD 27 | M27×3 | 41 | 380 | 56 | 73 | 10 | 25 | 192 | |
| MSD 30 | M30×3.5 | 46 | 460 | 62 | 79 | 12 | 27 | 198 | |
| MSD 33 | M33×3.5 | 50 | 570 | 67 | 84 | 14 | 29 | 240 | |
| MSD 36 | M36×4 | 55 | 670 | 72 | 90 | 16 | 32 | 248 | |
| MSD 39 | M39×4 | 60 | 800 | 78 | 98 | 18 | 34 | 253 | |
| MSD 42 | M42×4.5 | 65 | 920 | 84 | 107 | 20 | 37 | 256 | |
| MSD 45 | M45×4.5 | 70 | 1080 | 90 | 112 | 22 | 39 | 260 | |
| MSD 48 | M48×5 | 75 | 1220 | 95 | 123 | 24 | 42 | 268 | |
| MSD 52 | M52×5 | 80 | 1450 | 103 | 129 | 28 | 46 | 288 | |
| MSD 56 | M56×5.5 | 85 | 1680 | 107 | 136 | 31 | 49 | 328 | |
| MSD 60 | M60×5.5 | 90 | 2010 | 115 | 146 | 34 | 52 | 330 | |
| MSD 64 | M64×6 | 95 | 2210 | 121 | 155 | 37 | 55 | 346 | |
| MSD 68 | M68×6 | 100 | 2600 | 127 | 164 | 40 | 58 | 358 | |
| MSD 72 | M72×6 | 105 | 2880 | 131 | 177 | 44 | 62 | 378 | |
| MSD 76 | M76×6 | 110 | 3320 | 137 | 183 | 46 | 66 | 385 | |
| MSD 80 | M80×6 | 115 | 3610 | 143 | 203 | 50 | 68 | 414 | |
| MSD 90 | M90×6 | 130 | 4650 | 161 | 232 | 58 | 77 | 446 | |
| MSD 100 | M100×6 | 145 | 5830 | 179 | 252 | 66 | 85 | 487 | |