ITEM NAME:Helping Hand Soldering Iron Station PCB Single Flexible Nylon Arm Spare Part Set Description Specification: Brand new Length: approx. 340mm Arm Thread Diameter: approx. 1/4 inch Convenient to use. Durable in use. Suitable for universal strange third hand four arms soldering station PCB fixture with heavy metal base. Package included: 1 x Single Arm Spare Part Note: Please allow 1-2cm errors due to manual measurement. Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same..1 x Single Arm Spare Part. Detail Image.