美国KEWELL主要生产自动拧紧机使用的套筒，螺丝批
制造标准GGG-W-660A
DIN3121
DIN3129
主要产品有1/4套筒，3/8内六角套筒，1/2螺丝批，3/4油压脉动套筒，1寸液压扳手套筒，1-1/2内四方气动套筒
电动拧紧枪，气动拧紧工具等
主要应用领域，汽车制造，汽车零部件制造，船舶组装，风力发电机组装，油田设备组装等领域
套筒驱动端为内四方 3.5英寸=3-1/2英寸=88.9mm
可承载10000Nm
相关尺寸如下：
| 英制工作端SW | 驱动端 内四方 | 工作端外径 | 驱动端外径 | 总长度 |
| 4-1/8' | 3-1/2寸 3.5英寸 88.9mm | 165mm | 175mm | 176mm |
| 4-1/4' | 3-1/2寸 3.5英寸 88.9mm | 168mm | 175mm | 176mm |
| 4-3/8' | 3-1/2寸 3.5英寸 88.9mm | 172mm | 175mm | 180mm |
| 4-1/2' | 3-1/2寸 3.5英寸 88.9mm | 175mm | 175mm | 182mm |
| 4-5/8' | 3-1/2寸 3.5英寸 88.9mm | 178mm | 175mm | 183mm |
| 4-3/4' | 3-1/2寸 3.5英寸 88.9mm | 180mm | 175mm | 185mm |
| 4-7/8' | 3-1/2寸 3.5英寸 88.9mm | 188mm | 175mm | 190mm |
| 5' | 3-1/2寸 3.5英寸 88.9mm | 188mm | 175mm | 191mm |
| 5-1/8' | 3-1/2寸 3.5英寸 88.9mm | 193mm | 175mm | 194mm |
| 5-1/4' | 3-1/2寸 3.5英寸 88.9mm | 197mm | 175mm | 198mm |
| 5-3/8' | 3-1/2寸 3.5英寸 88.9mm | 201mm | 175mm | 202mm |
| 5-1/2' | 3-1/2寸 3.5英寸 88.9mm | 205mm | 175mm | 205mm |
| 5-5/8' | 3-1/2寸 3.5英寸 88.9mm | 208mm | 200mm | 208mm |
| 5-3/4英寸 | 3-1/2寸 3.5英寸 88.9mm | 212mm | 200mm | 210mm |
| 5-7/8' | 3-1/2寸 3.5英寸 88.9mm | 215mm | 200mm | 212mm |
| 6英寸 | 3-1/2寸 3.5英寸 88.9mm | 219mm | 200mm | 214mm |
| 6-1/8' | 3-1/2寸 3.5英寸 88.9mm | 223mm | 200mm | 216mm |
| 6-1/4英寸 | 3-1/2寸 3.5英寸 88.9mm | 227mm | 200mm | 218mm |
| 6-3/8英寸 | 3-1/2寸 3.5英寸 88.9mm | 231mm | 200mm | 221mm |
| 6-1/2英寸 | 3-1/2寸 3.5英寸 88.9mm | 235mm | 200mm | 224mm |
| 6-5/8英寸 | 3-1/2寸 3.5英寸 88.9mm | 238mm | 200mm | 226mm |
| 6-3/4英寸 | 3-1/2寸 3.5英寸 88.9mm | 241mm | 200mm | 228mm |
| 6-7/8英寸 | 3-1/2寸 3.5英寸 88.9mm | 245mm | 200mm | 230mm |
| 7英寸 | 3-1/2寸 3.5英寸 88.9mm | 251mm | 200mm | 232mm |
| 7-1/8英寸 | 3-1/2寸 3.5英寸 88.9mm | 257mm | 200mm | 234mm |
| 7-1/4英寸 | 3-1/2寸 3.5英寸 88.9mm | 263mm | 200mm | 236mm |
| 7-3/8英寸 | 3-1/2寸 3.5英寸 88.9mm | 269mm | 200mm | 238mm |
| 7-1/2英寸 | 3-1/2寸 3.5英寸 88.9mm | 275mm | 200mm | 240mm |
| 7-5/8英寸 | 3-1/2寸 3.5英寸 88.9mm | 278mm | 200mm | 242mm |
| 7-3/4英寸 | 3-1/2寸 3.5英寸 88.9mm | 282mm | 200mm | 245mm |
| 7-7/8英寸 | 3-1/2寸 3.5英寸 88.9mm | 285mm | 200mm | 248mm |
| 8英寸 | 3-1/2寸 3.5英寸 88.9mm | 290mm | 200mm | 250mm |
| 8-1/8英寸 | 3-1/2寸 3.5英寸 88.9mm | 293mm | 200mm | 251mm |
| 8-1/4英寸 | 3-1/2寸 3.5英寸 88.9mm | 295mm | 200mm | 255mm |
| 8-3/8英寸 | 3-1/2寸 3.5英寸 88.9mm | 298mm | 200mm | 258mm |
| 8-1/2英寸 | 3-1/2寸 3.5英寸 88.9mm | 300mm | 200mm | 260mm |
| 8-5/8英寸 | 3-1/2寸 3.5英寸 88.9mm | 305mm | 200mm | 262mm |
| 8-3/4英寸 | 3-1/2寸 3.5英寸 88.9mm | 310mm | 200mm | 264mm |
| 8-7/8英寸 | 3-1/2寸 3.5英寸 88.9mm | 313mm | 200mm | 267mm |
