Tube pin straightener
For all noval tubes, like ECC81, ECC88, EL84. Made from hard plastic, so it will not damage cold coating, or scratch the pins. Note that if the tube pins are not straight, the mechanical force will or may eventually lead to loss if vacuum, you will find this confirmed in old tube handbooks. Never plug in a tube when the pins are not straight! It is not dangerous to bend the pins, but it is dangerous to leave them in a socket under force, this will cause micro leakage after months or years, and affected vacuum will cause noise, and/or defective tubes.
The pin straightener must slide on the tubes without any force, and then the pins are ok. So also useful just to check the pins, and you will see many tubes you thought that are ok, will now benefit from a pin straightening action.
Very strong material, can be used for hundreds of tubes.
More information here